CN117870205A

CN117870205A - Evaporation cooling low-temperature type total heat recovery air-cooled multi-connected heat pump unit

Info

Publication number: CN117870205A
Application number: CN202311636429.5A
Authority: CN
Inventors: 李国斌; 李一博
Original assignee: Hanrun United High Tech Development Beijing Co ltd
Current assignee: Hanrun United High Tech Development Beijing Co ltd
Priority date: 2018-08-13
Filing date: 2018-08-13
Publication date: 2024-04-12
Also published as: CN108775730A; CN108775730B

Abstract

The invention provides an evaporative cooling low-temperature type total heat recovery air-cooled multi-connected heat pump unit, wherein a first port A of a first four-way valve is communicated with an outflow port, a second port B of the first four-way valve is communicated with one end of a first heat exchanger, a third port C of the first four-way valve and a first port A of a second four-way valve are communicated with a return port, a fourth port D of the first four-way valve is communicated with a third port C of the second four-way valve, a second port B of the second four-way valve is communicated with one end of an evaporative cooling heat exchange unit, and a fourth port D of the second four-way valve is communicated with one end of the second heat exchanger; the first heat exchanger is communicated with a liquid reservoir through a seventh electromagnetic valve and a first one-way valve, and the liquid reservoir is communicated with a first expansion valve; the first expansion valve is communicated with the second heat exchanger through the second one-way valve; the evaporation cold heat exchange unit is communicated with the second heat exchanger through a fifth electromagnetic valve and is communicated with the first heat exchanger through a fourth electromagnetic valve; the second heat exchanger is communicated with the fourth one-way valve and the liquid reservoir through a sixth electromagnetic valve; the first expansion valve is communicated with the evaporation cold heat exchange unit through a third one-way valve; so as to save energy and reduce cost.

Description

Evaporation cooling low-temperature type total heat recovery air-cooled multi-connected heat pump unit

The invention is as follows: 201810916165.1, name of invention: the patent of the invention of the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit is applied separately.

Technical Field

The invention relates to the technical field of heat pumps, in particular to an evaporative cooling low-temperature type total heat recovery air-cooled multi-connected heat pump unit.

Background

At present, the air conditioning unit mainly comprises the following three cooling modes:

an air cooling mode is adopted, and outdoor ambient air is utilized to exchange heat with a refrigeration medium through an air cooling fin heat exchanger to cool the air conditioner.

In a water cooling mode, the cooling water cooled by the cooling tower exchanges heat with a refrigeration medium to cool, and the process is generally completed in a shell-and-tube condenser.

The evaporative cooling mode also uses the heat exchange between the cooling water and the refrigeration medium and the direct vaporization of the cooling water to cool the refrigerant, and is basically different from the water cooling mode in that the evaporative cooling mode directly sprays the cooling water on the surface of the condenser, and the heat exchange quantity between the cooling water and the refrigerant in unit time is improved by utilizing the vaporization latent heat of the water, thereby improving the efficiency of the unit.

Of the three cooling modes, the same cooling capacity is obtained in a summer refrigerating mode, and the energy consumption of a unit adopting an evaporative cooling mode (evaporative cooling unit) is the lowest. Generally, the same cooling capacity is obtained, and the evaporative cooling unit saves more than 30% of energy compared with an air cooling unit (multi-connected unit) and more than 15% of energy compared with a unit (water cooling unit) adopting a water cooling mode (water-water exchange).

When the air conditioning unit with the three cooling modes operates in the refrigerating mode, heat energy generated by working of the compressor is required to be discharged to the outdoor environment, a large amount of discharged heat energy (heat energy) is generated by consuming electric energy, and if the heat energy discharged to the atmosphere is recovered as a byproduct of the refrigerating unit, a large amount of free energy can be obtained, so that the use cost of customers is reduced.

The compressor of the traditional air-cooled heat pump unit is a refrigerating compressor for common refrigeration and one-time supercharging, and the efficiency of the heat pump unit is greatly reduced when the outdoor environment temperature is lower than-5 ℃ and is almost 0 when the outdoor environment temperature is lower than-12 ℃ when the outdoor environment temperature is used as a heat pump, so that the application range and the application area of the heat pump are limited.

The evaporative cooling unit is evolved from a water chilling unit, has remarkable advantages in refrigeration and water chilling units, especially compared with air-cooled refrigeration, but has the following two disadvantages when the evaporative cooling unit is used as a heat pump unit capable of refrigerating and heating:

on the one hand, the evaporation cooling unit takes the 'condensation heat' released by the saturated water vapor in the cooling water absorbed air as a heat source in the winter heating mode, and the heat exchange efficiency is very low, so that the energy consumption of the evaporation cooling unit in the winter heating mode is higher.

On the other hand, as the freezing point of the cooling water is 0 ℃, when the ambient temperature is lower than 0 ℃, the cooling water sprayed to the surface of the condenser is frozen, so that the evaporation cooling unit can normally heat only in areas with the ambient temperature higher than 0 ℃, and the use area is limited.

The thermodynamic cycle process of the air conditioning unit is the process of transferring cold energy and heat between the evaporator and the condenser, the inverse cycle process of refrigeration is heating, and the evaporative cooling refrigerating unit only realizes one of the functions, so the evaporative cooling and heating pump technology needs to be perfected.

From the above analysis, how to develop a heat pump unit with efficient refrigeration, low-temperature heating, and energy recycling, so as to save energy and reduce the use cost of users, has become a technical problem to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, the invention provides an evaporative cooling low-temperature type total heat recovery air-cooled multi-connected heat pump unit, which is used for saving energy and reducing the use cost of users.

An evaporative cooling low-temperature type total heat recovery air-cooled multi-connected heat pump unit comprises a compressor, a first four-way valve, an evaporative cooling heat exchange unit, a second heat exchanger, a first heat exchanger, a second four-way valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve, a seventh electromagnetic valve, a liquid reservoir, a first expansion valve, an economizer, a third electromagnetic valve, a second check valve, a third check valve, a first check valve and a fourth check valve;

The compressor is provided with a return port and a discharge port; the first heat exchanger and the second heat exchanger are both provided with a heat exchange water inlet and a heat exchange water outlet;

the first port A of the first four-way valve is communicated with the outflow port, the second port B of the first four-way valve is communicated with one end of the first heat exchanger, the third port C of the first four-way valve and the first port A of the second four-way valve are communicated with the backflow port, the fourth port D of the first four-way valve is communicated with the third port C of the second four-way valve, the second port B of the second four-way valve is communicated with one end of the evaporative cooling heat exchange unit, and the fourth port D of the second four-way valve is communicated with one end of the second heat exchanger;

the other end of the first heat exchanger is communicated with the liquid storage device through the seventh electromagnetic valve and the first one-way valve, and the liquid storage device is communicated with the first expansion valve; the first expansion valve is communicated with the other end of the second heat exchanger through the second one-way valve;

the other end of the evaporative cooling heat exchange unit is communicated with the other end of the second heat exchanger through the fifth electromagnetic valve; the other end of the evaporative cooling heat exchange unit is also communicated with the other end of the first heat exchanger through the fourth electromagnetic valve;

The other end of the second heat exchanger is also communicated with the liquid reservoir through the sixth electromagnetic valve and the fourth one-way valve; the first expansion valve is also communicated with the other end of the evaporative cooling heat exchange unit through the third one-way valve;

the second heat exchangers are connected in parallel and provided with a plurality of groups.

Preferably, the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit further comprises a second expansion valve and an economizer;

the compressor also has an EVI injection port, and the economizer has a first connection port and a second connection port which are communicated with each other, and a third connection port and a fourth connection port which are communicated with each other;

the communicating structure of the liquid reservoir and the first expansion valve is as follows: the liquid reservoir is communicated with a fourth connecting port of the economizer, and the liquid reservoir is communicated with a first connecting port of the economizer through the third electromagnetic valve and the second expansion valve; a second connection port of the economizer is communicated with the EVI jet port; the first connection port communicates with the first expansion valve.

Preferably, in the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit, the evaporative cooling heat exchange unit comprises an air-cooled component and an evaporative cooling component;

The air cooling assembly comprises an air cooling heat exchanger and a fan for enabling air to flow through the air cooling heat exchanger;

the evaporation cooling assembly comprises an evaporation cooling heat exchanger and a spraying assembly for spraying cooling water to the evaporation cooling heat exchanger.

Preferably, in the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit, the air-cooled heat exchanger is arranged in parallel with the evaporative cooling heat exchanger, a first type of first electromagnetic valve is arranged at one end of the air-cooled heat exchanger, and a second type of first electromagnetic valve is arranged at one end of the evaporative cooling heat exchanger;

or the air-cooled heat exchanger and the evaporative cooling heat exchanger are arranged in series, one end of the air-cooled heat exchanger is provided with a second type first electromagnetic valve, one end of the evaporative cooling heat exchanger is connected to one side of the second type first electromagnetic valve through a second type second electromagnetic valve, and the other end of the evaporative cooling heat exchanger is connected to the other side of the second type first electromagnetic valve;

or, the air-cooled heat exchanger is connected with the evaporative cooling heat exchanger in series, one end of the evaporative cooling heat exchanger is provided with a third type first electromagnetic valve, one end of the air-cooled heat exchanger is connected with one side of the third type first electromagnetic valve through a third type second electromagnetic valve, and the other end of the air-cooled heat exchanger is connected with the other side of the third type first electromagnetic valve.

Preferably, in the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit, the air-cooled heat exchanger is a fin type heat exchanger;

and/or the evaporative cooling heat exchanger is a plate and tube heat exchanger.

Preferably, in the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit, the air-cooled heat exchanger is located above the evaporative cooling heat exchanger.

Preferably, the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit further comprises a filter, wherein the filter is positioned between the air-cooled heat exchanger and the evaporative cooling heat exchanger.

Preferably, in the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit, the spray assembly comprises a spray water pump and a sprayer provided with a nozzle, and a liquid outlet of the spray water pump is communicated with the sprayer.

Preferably, the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit further comprises an outdoor unit shell and two outer guard plates positioned in the outdoor unit shell, wherein a cavity for accommodating the air-cooled heat exchanger and the evaporative cooling heat exchanger is formed between the two outer guard plates and the top wall and the bottom wall of the outdoor unit shell;

the cavity wall of the cavity is provided with an air inlet and an air outlet.

Preferably, in the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit, the air inlet is positioned at the top of the cavity, and the air outlet is positioned at the bottom of the cavity.

Preferably, in the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit, an air outlet channel is formed between the side wall of the outdoor unit shell and the outer guard plate, and the fan is located in the air outlet channel.

Preferably, the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit further comprises a water receiver arranged in the air outlet channel;

the outdoor unit comprises a shell, a spray assembly and a control system, wherein a water tank is arranged in the shell of the outdoor unit, the spray assembly comprises a spray water pump and a sprayer provided with a nozzle, and a liquid inlet of the spray water pump is communicated with the water tank;

the water collecting outlet of the water collector is arranged corresponding to the opening of the water tank.

Preferably, in the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit, a heat exchange water inlet or a heat exchange water outlet of the first heat exchanger is communicated with a first circulating pump;

and/or the heat exchange water inlet or the heat exchange water outlet of the second heat exchanger is communicated with a second circulating pump.

Preferably, in the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit, the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit further comprises a drying filter, wherein the drying filter is arranged at an outlet of the liquid reservoir.

Preferably, in the air-cooled evaporative cooling low-temperature heat pump total heat recovery unit, the air-cooled evaporative cooling low-temperature heat pump total heat recovery unit further comprises a gas-liquid separator, wherein the third port C of the first four-way valve and the first port A of the second four-way valve are communicated with the reflux port through the gas-liquid separator.

According to the technical scheme, the air cooling evaporation low-temperature type heat pump total heat recovery unit provided by the invention can realize six modes under three functions of refrigerating, heating and hot water of the unit, effectively ensures the total heat recovery of the heat pump, and selects different modes according to different requirements, so that the recovered heat energy can be conveniently applied to other fields, the energy is saved, and the use cost of a user is reduced.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall flow of the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit provided by the invention;

Fig. 2 is a schematic overall flow chart of a specific embodiment of a refrigeration mode of the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit provided by the invention;

fig. 3 is a schematic overall flow chart of a heating mode embodiment of the evaporative cooling low-temperature type total heat recovery air-cooled heat pump unit provided by the invention;

fig. 4 is a schematic overall flow chart of a hot water mode embodiment of the air-cooled evaporative cooling low-temperature heat pump total heat recovery unit provided by the invention;

fig. 5 is a schematic overall flow chart of a specific embodiment of a total heat recovery mode of the evaporative cooling low-temperature type total heat recovery air-cooled heat pump unit provided by the invention;

fig. 6 is a schematic overall flow chart of a specific embodiment of defrosting mode during refrigeration operation of the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit provided by the invention;

fig. 7 is a schematic overall flow chart of a specific embodiment of defrosting mode in the operation of heating water of the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit;

FIG. 8 is a schematic cross-sectional view of an evaporative cooling low-temperature total heat recovery air-cooled heat pump unit provided by the invention;

fig. 9 is a schematic structural diagram of an evaporative cooling low-temperature type total heat recovery air-cooled heat pump unit provided by the invention;

FIG. 10 is a schematic cross-sectional view of a first side of the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit provided by the invention;

FIG. 11 is a schematic diagram of a second side cross-sectional view of the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit provided by the invention;

fig. 12 is a schematic top view of an evaporative cooling low-temperature type total heat recovery air-cooled heat pump unit according to the present invention;

FIG. 13 is a schematic overall flow diagram of a second embodiment of an evaporative cooling low temperature total heat recovery air-cooled heat pump unit according to the present invention;

fig. 14 is a schematic overall flow diagram of a third embodiment of an evaporative cooling low-temperature total heat recovery air-cooled heat pump unit according to the present invention;

FIG. 15 is a schematic overall flow chart of a fourth embodiment of an evaporative cooling low-temperature total heat recovery air-cooled heat pump unit according to the present invention;

FIG. 16 is a schematic view of the overall flow of a first embodiment of an evaporative cooling heat exchange unit provided by the present invention;

FIG. 17 is a schematic view of the overall flow of a second embodiment of an evaporative cooling heat exchange unit provided by the present invention;

fig. 18 is a schematic overall flow diagram of a third embodiment of an evaporative cooling heat exchange unit according to the present invention.

Detailed Description

In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1, an embodiment of the present invention provides an air-cooled evaporative low-temperature heat pump total heat recovery unit, which includes a compressor 1, a first four-way valve 2, an evaporative cooling heat exchange unit, a second heat exchanger 9, a first heat exchanger 26, a second four-way valve 29, a fourth solenoid valve 22, a fifth solenoid valve 23, a sixth solenoid valve 24, a seventh solenoid valve 25, a liquid reservoir 5, a second expansion valve 7, a first expansion valve 8, an economizer 14, a third solenoid valve 15, a second check valve 18, a third check valve 19, a first check valve 20, and a fourth check valve 21.

The compressor 1 is provided with a return port and a discharge port; the first heat exchanger 26 and the second heat exchanger 9 are both provided with a heat exchange water inlet and a heat exchange water outlet.

The first interface A of the first four-way valve 2 is communicated with the outflow port, the second interface B of the first four-way valve 2 is communicated with one end of the first heat exchanger 26, the third interface C of the first four-way valve 2 and the first interface A of the second four-way valve 29 are communicated with the backflow port, the fourth interface D of the first four-way valve 2 is communicated with the third interface C of the second four-way valve 29, the second interface B of the second four-way valve 29 is communicated with one end of the evaporative cooling heat exchange unit, and the fourth interface D of the second four-way valve 29 is communicated with one end of the second heat exchanger 9.

The other end of the first heat exchanger 26 is communicated with the liquid reservoir 5 through a seventh electromagnetic valve 25 and a first one-way valve 20, and the liquid reservoir 5 is communicated with the first expansion valve 8; the first expansion valve 8 communicates with the other end of the second heat exchanger 9 through a second check valve 18.

The other end of the evaporative cooling heat exchange unit is communicated with the other end of the second heat exchanger 9 through a fifth electromagnetic valve 23; the other end of the evaporative cooling heat exchange unit is also in communication with the other end of the first heat exchanger 26 through a fourth solenoid valve 22.

The other end of the second heat exchanger 9 is also communicated with the liquid reservoir 5 through a sixth electromagnetic valve 24 and a fourth one-way valve 21; the first expansion valve 8 is also in communication with the other end of the evaporative cooling heat exchange unit via a third one-way valve 19.

The air cooling evaporation cooling low-temperature type heat pump total heat recovery unit provided by the embodiment of the invention can realize six modes under the three functions of refrigerating, heating and hot water of the unit, effectively ensures the total heat recovery of the heat pump, is convenient for applying the recovered heat energy to other fields, selects different modes according to different requirements, saves energy sources and reduces the use cost of users.

Preferably, the compressor 1 is a jet culvert compressor. Through the arrangement, the energy conservation and high efficiency of the compressor 1 in operation are ensured, the performance is stable at severe cold temperature, and the unit can be ensured to stably operate in cold weather in the south and the north.

It can be understood that the four-way valve can be switched to realize the communication of the first interface A, the second interface B, the third interface C and the fourth interface D of the four-way valve.

Wherein an economizer 14 may be provided, in this embodiment, further comprising a second expansion valve 7, the compressor 1 further having an EVI injection port, the economizer 14 having a first connection port and a second connection port communicating with each other and a third connection port and a fourth connection port communicating with each other; the communication structure between the liquid reservoir 5 and the first expansion valve 8 is as follows: the liquid reservoir 5 is communicated with a fourth connecting port of the economizer 14, and the liquid reservoir 5 is communicated with a first connecting port of the economizer 14 through a third electromagnetic valve 15 and a second expansion valve 7; the second connection port of the economizer 14 communicates with the EVI injection port; the first connection port communicates with the first expansion valve 8. In the embodiment with a dry filter 6, the dry filter 6 is arranged at the outlet of the reservoir 5.

Of course, the economizer 14 may not be provided, and the reservoir 5 may be directly connected to the first expansion valve 8. In the embodiment with a dry filter 6, there is a dry filter 6 between the reservoir 5 and the first expansion valve 8.

In the first mode, as shown in fig. 2, the state is a cooling function mode. The third 15, fourth 22 and sixth 24 solenoid valves are open, while the fifth 23 and seventh 25 solenoid valves are closed.

The first port A of the first four-way valve 2 is communicated with the fourth port D, and the second port B is communicated with the third port C. That is, the outflow port communicates with one end of the evaporative cooling heat exchange unit through the second four-way valve 29, and one end of the first heat exchanger 26 communicates with the return port. The first port a of the second four-way valve 29 communicates with its second port B, and its third port C communicates with its fourth port D. I.e. the return port communicates with one end of the second heat exchanger 9.

In this state, the compressor 1 is started, the spray water pump 12 of the evaporative cooling heat exchange unit is started, the fan 11 is started, the first electromagnetic valve 16 is closed to close the air cooling heat exchanger 3, and the second electromagnetic valve 17 is opened to open the evaporative cooling heat exchanger 4 to be in a heat exchange state, so that the heat discharge of the evaporative cooling heat exchange unit to the outside is ensured.

Preferably, in the present embodiment, the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4 are in a parallel state.

The compressor 1 is electrified to work, and high-temperature and high-pressure gaseous refrigerant is injected from the air outlet of the compressor 1 to enter the first four-way valve 2, then enter the second four-way valve 29, and finally enter one end of the evaporative cooling heat exchange unit. Since one end of the air-cooled heat exchanger 3 has the first electromagnetic valve 16, one end of the evaporative cooling heat exchanger 4 is connected to one side of the first electromagnetic valve 16 through the second electromagnetic valve 17, and the other end of the evaporative cooling heat exchanger 4 is connected to the other side of the first electromagnetic valve 16. The first electromagnetic valve 16 is closed and the second electromagnetic valve 17 is opened, so that the air-cooled heat exchanger 3 is connected in parallel with the evaporative cold heat exchanger 4, but the refrigerant does not pass through the air-cooled heat exchanger 3, so that the air-cooled heat exchanger 3 is in a standby state; the refrigerant passes through the evaporative cooling heat exchanger 4 and releases heat, so that the vaporous high-temperature high-pressure refrigerant begins to largely condense, and the refrigerant releases heat into the air; and then through the fourth solenoid valve 22 and the first check valve 20 and into the reservoir 5.

In implementations with an economizer 14, the refrigerant after entering the receiver tank 5 is split into a main circuit and an auxiliary EVI circuit:

in the main circuit, the refrigerant passes through the liquid storage tank 5, passes through the fourth connection port and the third connection port of the economizer 14, then passes through the first expansion valve 8 and is reduced to low-temperature low-pressure refrigerant liquid refrigerant, passes through the second one-way valve 18 and the sixth electromagnetic valve 24 and enters the second heat exchanger 9, and the refrigerant is gasified and evaporated into low-temperature low-pressure steam and then enters the return port of the compressor 1 through the second four-way valve 29 to carry out the next cycle.

In the auxiliary EVI loop, the refrigerant passes through the liquid storage tank 5, then passes through the third electromagnetic valve 15 and the electronic expansion valve 7, then passes through the first connecting port and the second connecting port of the economizer 14, and further is vaporized and evaporated to become medium-temperature medium-pressure steam which enters the compressor 1 through the EVI injection port of the compressor 1 to complete a cycle.

As shown in fig. 13, in the implementation without the economizer 14, the refrigerant is cooled to a low-temperature low-pressure refrigerant liquid refrigerant by the first expansion valve 8 after entering the liquid storage tank 5, enters the second heat exchanger 9 through the second check valve 18 and the sixth solenoid valve 24, is gasified and evaporated to low-temperature low-pressure steam, and then enters the return port of the compressor 1 through the second four-way valve 17, and then the next cycle is performed.

Wherein the first heat exchanger 26 is not passed. Thus, the first mode described above may be referred to as a single cooling function mode.

In the second mode, as shown in fig. 3, the mode is a heating mode. The third 15, fourth 22 and sixth 24 solenoid valves are open, while the fifth 23 and seventh 25 solenoid valves are closed.

The first port A of the first four-way valve 2 is communicated with the fourth port D, and the second port B is communicated with the third port C. That is, the outflow port communicates with one end of the second heat exchanger 9 through the first four-way valve 2, and one end of the first heat exchanger 26 communicates with the return port. The first port a of the second four-way valve 29 communicates with its second port B, and its third port C communicates with its fourth port D. That is, the return port is communicated with one end of the evaporative cooling heat exchange unit, and one end of the second heat exchanger 9 is communicated with the return port through the first four-way valve 2.

In this state, the compressor 1 is started, the fan 11 is started, the second electromagnetic valve 17 is closed, the first electromagnetic valve 16 is opened, the spraying system is closed, and the air-cooled heat exchanger and the second heat exchanger 9 in the evaporative cooling heat exchange unit 4 are operated.

The compressor 1 is electrified to work, and high-temperature and high-pressure gaseous refrigerant is injected from the air outlet of the compressor 1 to enter the first four-way valve 2 and the second four-way valve 29 and then enter the second heat exchanger 9. The high-temperature high-pressure gaseous refrigerant releases heat to indoor side secondary refrigerant water and then condenses and liquefies, the high-temperature high-pressure gaseous refrigerant is changed into medium-temperature high-pressure vapor-liquid mixture and flows out of the second heat exchanger 9, the high-temperature high-pressure gaseous refrigerant condenses in the second heat exchanger 9, the heat is released to the secondary refrigerant water flowing through the second heat exchanger 9, and the secondary refrigerant water is heated and then enters the tail end system as heating circulating water to dissipate heat to realize indoor heating. The medium-temperature medium-pressure refrigerant sequentially passes through the fourth check valve 21 and then enters the liquid storage tank 5.

in the main circuit, the refrigerant passes through the liquid storage tank 5, then passes through the fourth connection port of the economizer 14 and the third connection port thereof, then passes through the first expansion valve 8 and is reduced to be low-temperature low-pressure refrigerant liquid refrigerant, and then enters the evaporative cooling heat exchange unit through the third one-way valve 19, wherein one end of the air cooling heat exchanger 3 is provided with the first electromagnetic valve 16, one end of the evaporative cooling heat exchanger 4 is connected to one side of the first electromagnetic valve 16 through the second electromagnetic valve 17, and the other end of the evaporative cooling heat exchanger 4 is connected to the other side of the first electromagnetic valve 16. The first electromagnetic valve 16 is opened and the second electromagnetic valve 17 is closed, so that the air-cooled heat exchanger 3 is connected in parallel with the evaporative cooling heat exchanger 4, the refrigerant does not pass through the evaporative cooling heat exchanger 4, namely, the evaporative cooling heat exchanger 4 is in a standby state, the refrigerant absorbs heat through the air-cooled heat exchanger 3, the liquid low-temperature low-pressure refrigerant begins to evaporate a large amount of heat from the air, the refrigerant is gasified and evaporated into low-temperature low-pressure steam, and then enters a reflow port of the compressor 1 through the second four-way valve 29 for the next cycle.

As shown in fig. 13, in the implementation without the economizer 14, the low-temperature low-pressure refrigerant liquid refrigerant which is reduced to low-temperature low-pressure refrigerant by the first expansion valve 8 enters the evaporative cooling heat exchange unit through the third check valve 19, the first solenoid valve 16 is opened, and the second solenoid valve 17 is closed, so that the air-cooled heat exchanger 3 is connected in parallel with the evaporative cooling heat exchanger 4, the refrigerant absorbs heat by the air-cooled heat exchanger 3, and the refrigerant is gasified and evaporated into low-temperature low-pressure steam and then enters the return port of the compressor 1 through the second four-way valve 29 for the next cycle.

In this process, the refrigerant absorbs heat from the air-cooled heat exchanger and releases the heat to the second heat exchanger 9 to produce heating circulating hot water for the purpose of individual heating.

The second heat exchanger 9 may be an indoor side heat exchanger. Therefore, the sixth mode described above can be used as a separate heating mode.

In the third mode, as shown in fig. 4, the hot water alone mode. The third 15, fifth 23 and seventh 25 solenoid valves are open, while the fourth 22 and sixth 24 solenoid valves are closed, the second 17 solenoid valve is closed and the first 16 solenoid valve is open.

The first port A of the first four-way valve 2 is communicated with the second port B, and the third port C is communicated with the fourth port D. I.e. the outflow opening communicates with one end of the first heat exchanger 26. The first port a of the second four-way valve 29 communicates with its second port B, and its third port C communicates with its fourth port D. I.e. the return port communicates with one end of the evaporative cooling heat exchange unit.

In this state, the compressor 1 is started, the fan 11 is turned on, the spray water pump 12 of the evaporative cooling heat exchange unit is turned off, at this time, the evaporative cooling heat exchanger in the evaporative cooling heat exchange unit is turned off, and the air-cooled heat exchanger absorbs air heat. In this embodiment, the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4 are in a parallel connection state.

The compressor 1 is electrified to work, high-temperature high-pressure gaseous refrigerant is injected from the air outlet of the compressor 1, enters the four-way valve 2 and then enters the first heat exchanger 26, external cold water enters from the heat exchange water inlet of the first heat exchanger 26, and then hot water after heat exchange flows out from the heat exchange water outlet of the first heat exchanger 26; the medium-temperature high-pressure liquid refrigerant subjected to heat exchange by the first heat exchanger 26 passes through the seventh electromagnetic valve 25 and the first one-way valve 20 and then enters the liquid storage tank 5.

in the main circuit, the refrigerant passes through the liquid storage tank 5, passes through the fourth connection port and the third connection port of the economizer 14, passes through the first expansion valve 8, is reduced to low-temperature low-pressure refrigerant liquid refrigerant, and passes through the second one-way valve 18 and the fifth electromagnetic valve 23 to enter one end of the evaporative cooling heat exchange unit. One end of the air-cooled heat exchanger 3 is provided with a first electromagnetic valve 16, one end of the evaporative cooling heat exchanger 4 is connected to one side of the first electromagnetic valve 16 through a second electromagnetic valve 17, and the other end of the evaporative cooling heat exchanger 4 is connected to the other side of the first electromagnetic valve 16. The first electromagnetic valve 16 is opened and the second electromagnetic valve 17 is closed, so that the air-cooled heat exchanger 3 is connected in parallel with the evaporative cooling heat exchanger 4, and the refrigerant does not pass through the evaporative cooling heat exchanger 4, i.e., the evaporative cooling heat exchanger 4 is in a standby state, and the refrigerant passes through the air-cooled heat exchanger 3 and absorbs heat; the refrigerant is vaporized and evaporated into low-temperature low-pressure steam, and then enters a return port of the compressor 1 through the second four-way valve 29 for the next cycle.

As shown in fig. 13, in the implementation without the economizer 14, the low-temperature low-pressure refrigerant liquid refrigerant, which is then reduced to low-temperature low-pressure refrigerant through the first expansion valve 8, enters the evaporative cooling heat exchange unit through the second check valve 18 and the fifth solenoid valve 23. One end of the air-cooled heat exchanger 3 is provided with a first electromagnetic valve 16, one end of the evaporative cooling heat exchanger 4 is connected to one side of the first electromagnetic valve 16 through a second electromagnetic valve 17, and the other end of the evaporative cooling heat exchanger 4 is connected to the other side of the first electromagnetic valve 16. The first electromagnetic valve 16 is opened and the second electromagnetic valve 17 is closed, so that the air-cooled heat exchanger 3 is connected in parallel with the evaporative cooling heat exchanger 4, and the refrigerant does not pass through the evaporative cooling heat exchanger 4, namely, the evaporative cooling heat exchanger 4 is in a standby state, passes through the air-cooled heat exchanger 3 and absorbs heat, and enters a return port of the compressor 1 through the second four-way valve 29 after being gasified and evaporated into low-temperature low-pressure steam for the next cycle.

Wherein the first heat exchanger 26 may be a live hot water side heat exchanger. Thus, the third mode described above may be used as a single domestic hot water mode.

In the fourth mode, as shown in fig. 5, the domestic hot water mode in the cooling function. The third 15, sixth 24 and seventh 25 solenoid valves are open, while the fourth 22 and fifth 23 solenoid valves are closed.

The first port A of the first four-way valve 2 is communicated with the second port B, and the third port C is communicated with the fourth port D. I.e. the outflow opening communicates with one end of the first heat exchanger 26. The first port a of the second four-way valve 29 communicates with its fourth port D and its third port C communicates with its second port B. I.e. the return port communicates with one end of the second heat exchanger 9.

In this state, the compressor 1 is started, the spray water pump 12 of the evaporative cooling heat exchange unit is turned off, the fan 11 is stopped, and at this time, the evaporative cooling heat exchange unit is completely stopped, and the unit absorbs indoor heat to the maximum extent to produce hot water.

The compressor 1 is electrified to work, high-temperature high-pressure gaseous refrigerant is injected from the air outlet of the compressor 1, enters the first four-way valve 2 and then enters the first heat exchanger 26, external cold water enters from the heat exchange water inlet of the first heat exchanger 26, and then the heat exchanged hot water flows out from the heat exchange water outlet of the first heat exchanger 26; the low-temperature high-pressure liquid refrigerant subjected to heat exchange by the first heat exchanger 26 passes through the seventh electromagnetic valve 25 and the first check valve 20 and then enters the liquid storage tank 5.

In an implementation with an economizer 14, the refrigerant entering the liquid storage tank 5 is divided into a main circuit and an auxiliary EVI circuit:

In this process, the refrigerant absorbs heat from the second heat exchanger 9, so that the generated chilled water flows out of the second heat exchanger 9 and terminal indoor cooling is achieved, and the refrigerant releases heat through the first heat exchanger 26 to produce domestic hot water. The process realizes the operation of producing cold water and domestic hot water at the same time.

As shown in fig. 13, in the implementation without the economizer 14, the refrigerant is reduced to a low-temperature low-pressure refrigerant liquid refrigerant through the first expansion valve 8, then enters the second heat exchanger 9 through the second check valve 18 and the sixth solenoid valve 24, is gasified and evaporated to low-temperature low-pressure steam, and then enters the return port of the compressor 1 through the second four-way valve 29 and the first four-way valve 3, and then the next cycle is performed.

The first heat exchanger 26 may be a living hot water side heat exchanger, and the second heat exchanger 9 is an indoor side heat exchanger. Therefore, the fourth mode can be used as a domestic hot water mode under the refrigerating function. That is, the total heat recovery mode is realized by using all the heat absorbed by the second heat exchanger 9 for heat radiation from the hot water side of life by the first heat exchanger 26.

In the fifth mode, as shown in fig. 6, the state is the cooling defrosting function mode. The third 15, fourth 22 and sixth 24 solenoid valves are open, while the fifth 23 and seventh 25 solenoid valves are closed.

In this state, both the spray water pump 12 and the fan 11 of the evaporative cooling heat exchange unit are turned off, i.e., the air-cooled heat exchanger 3 is in a condensing and defrosting state. One end of the air-cooled heat exchanger 3 is provided with a first electromagnetic valve 16, one end of the evaporative cooling heat exchanger 4 is connected to one side of the first electromagnetic valve 16 through a second electromagnetic valve 17, and the other end of the evaporative cooling heat exchanger 4 is connected to the other side of the first electromagnetic valve 16. The first solenoid valve 16 is opened and the second solenoid valve 17 is closed, so that the air-cooled heat exchanger 3 is connected in parallel with the evaporative cooling heat exchanger 4, and the refrigerant does not pass through the evaporative cooling heat exchanger 4, i.e., the evaporative cooling heat exchanger 4 is in a standby state, and thus the defrosting operation is performed through the air-cooled heat exchanger 3.

The compressor 1 is electrified to work, high-temperature and high-pressure gaseous refrigerant is injected from the air outlet of the compressor 1, enters the first four-way valve 2 and then enters the second four-way valve 29, then enters one end of the air-cooled heat exchanger 3, and the gaseous high-temperature and high-pressure refrigerant starts to be largely condensed, and at the moment, the spray water pump 12 and the fan 11 are both closed, so that heat is released to the air-cooled heat exchanger 3 so as to achieve the defrosting purpose, and is not released to air, and then enters the liquid storage tank 5 after passing through the fourth electromagnetic valve 22 and the first one-way valve 20.

Thus, the first mode described above may be used as a cooling defrosting mode.

In the sixth mode, as shown in fig. 7, the state is the hot water defrosting function mode. The third 15, fifth 23 and seventh 25 solenoid valves are open, while the fourth 22 and sixth 24 solenoid valves are closed.

In this state, both the spray water pump 12 and the fan 11 of the evaporative cooling heat exchange unit are turned off, i.e., the air-cooled heat exchanger 3 is in a condensing and defrosting state. One end of the air-cooled heat exchanger 3 is provided with a first electromagnetic valve 16, one end of the evaporative cooling heat exchanger 4 is connected to one side of the first electromagnetic valve 16 through a second electromagnetic valve 17, and the other end of the evaporative cooling heat exchanger 4 is connected to the other side of the first electromagnetic valve 16. The first solenoid valve 16 is opened and the second solenoid valve 17 is closed, so that the air-cooled heat exchanger 3 is connected in parallel with the evaporative cooling heat exchanger 4, and the refrigerant does not pass through the evaporative cooling heat exchanger 4, i.e., the evaporative cooling heat exchanger 4 is in a standby state, and the refrigerant passes through the air-cooled heat exchanger 3 to perform a defrosting operation.

in the main loop, the refrigerant passes through the liquid storage tank 5, passes through the fourth connecting port and the third connecting port of the economizer 14, then passes through the first expansion valve 8 and is reduced to be low-temperature low-pressure refrigerant liquid refrigerant, passes through the third one-way valve 19 and the seventh electromagnetic valve 25 and enters the first heat exchanger 26, external hot water enters from the heat exchange water inlet of the first heat exchanger 26, the refrigerant reversely absorbs heat in the water tank of the first heat exchanger 26, and the refrigerant is compressed and warmed and then is conveyed to the air-cooled heat exchanger 3; the refrigerant is gasified and evaporated into low-temperature low-pressure steam, and then enters a return port of the compressor 1 through the first four-way valve 2 for the next cycle.

As shown in fig. 13, in the implementation without the economizer 14, after the refrigerant enters the liquid storage tank 5, the refrigerant is reduced to low-temperature low-pressure refrigerant liquid refrigerant through the first expansion valve 8, the low-temperature low-pressure refrigerant liquid refrigerant enters the first heat exchanger 26 through the third one-way valve 19 and the seventh electromagnetic valve 25, external hot water enters the first heat exchanger 26 through the heat exchange water inlet of the first heat exchanger 26, the refrigerant reversely absorbs heat in the water tank of the first heat exchanger 26, the heat is compressed and warmed and then is conveyed to the air-cooled heat exchanger 3, the heat is dissipated and then is output, and the refrigerant is vaporized and evaporated into low-temperature low-pressure steam and then enters the return port of the compressor 1 through the first four-way valve 2 for the next circulation.

Thus, the first mode described above may be used as a hot water frost function mode.

A high temperature protection mode may also be initiated. In the unit of the present embodiment, when the temperature of the outdoor environment is higher than the maximum allowable temperature (e.g., 25 ℃), the third solenoid valve 15 is closed, the liquid return temperature of the compressor 1 is reduced, thereby reducing the discharge temperature of the compressor 1, preventing the high temperature damage of the compressor 1, and when the temperature of the outdoor environment is lower than the maximum allowable temperature (e.g., 25 ℃), the third solenoid valve 15 is opened. When the temperature of the operation environment is lower than the maximum allowable temperature (such as 25 ℃), for example, when the exhaust temperature of the compressor 1 is higher than the maximum exhaust temperature (such as 105 ℃), the third electromagnetic valve 15 is closed, and the liquid return amount of the compressor 1 is increased, so that the exhaust temperature of the compressor 1 is reduced, and the compressor is prevented from being damaged.

Preferably, the unit also comprises a needle valve, a high-pressure gauge, a high-pressure protection switch, an exhaust temperature sensing probe and other components arranged at the outlet of the compressor 1; the back flow port of the compressor is provided with a needle valve, a low-pressure gauge, a low-pressure protection switch, an air cooling fin temperature sensing probe, an environment temperature sensing probe and other components, but the invention is not limited to the above.

It can be understood that the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit provided by the embodiment of the invention can be selectively started or closed by the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4. Thus, there are three states of the evaporative cooling heat exchange unit:

The first state is a state in which the air-cooled heat exchanger 3 is started and the evaporative cooling heat exchanger 4 is turned off, i.e., an independent air-cooled operation state.

In either the heating mode as in fig. 3 or the hot water mode as in fig. 4, the blower 11 is operated and the spray assembly is turned off. The refrigerating medium flows through the air-cooled heat exchanger 3, the fan 11 is operated to enable air to flow through the air-cooled heat exchanger 3, and the air exchanges heat with the refrigerating medium in the air-cooled heat exchanger 3.

When the unit is in the winter heating mode and the defrosting mode, the air-cooled heat exchanger 3 is started and the evaporative cold heat exchanger 4 is closed. Namely, the air cooling device is in an independent air cooling working state. The air-cooled heat exchanger 3 is the only heat exchanger, and the problem that the cooling water is frozen and cannot be heated is avoided, so that the unit can heat in an environment below 0 ℃. In the defrosting mode, the operation of defrosting the air-cooled heat exchanger 3 is only performed, and the evaporative cooling heat exchanger 4 is not operated all the time, so that there is no corresponding defrosting operation. Therefore, the operation of heating and defrosting can be completed below 0 ℃.

The second state is a state in which the evaporative cooling heat exchanger 4 is activated and the air-cooled heat exchanger 3 is turned off, i.e., an independent evaporative cooling operation state.

In the cooling mode as in fig. 1, the spray assembly is operated and the blower 11 is turned off. The refrigerating medium flows through the evaporative cooling heat exchanger 4, and the spraying assembly is operated to spray cooling water to the evaporative cooling heat exchanger 4, so that the cooling water exchanges heat with the refrigerating medium in the evaporative cooling heat exchanger 4.

When the unit is in a summer refrigeration mode, an independent evaporation cold working state is selected. That is, the evaporative cooling heat exchanger 4 is an outdoor heat exchanger. In an independent evaporation cooling working state, cooling water sprayed by the spraying component absorbs heat to the evaporation cooling heat exchanger 4, so that cooling and condensation of the refrigerant in the evaporation cooling heat exchanger 4 are ensured, and compared with an air cooling unit, the cooling system has higher refrigerating efficiency.

The third state is a state in which both the evaporative cooling heat exchanger 4 and the air-cooled heat exchanger 3 are off, that is, the evaporative cooling heat exchange unit is in a non-operating state as a whole.

In the total heat recovery mode as shown in fig. 5, neither the evaporative cooling heat exchanger 4 nor the air cooling heat exchanger 3 is operated, and the second heat exchanger 9 absorbs heat from the indoor side and then absorbs heat from the water in the water tank of the first heat exchanger 26, thereby completing heat recovery.

It will be appreciated that in this embodiment, the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4 are connected in parallel, and the branch on which the air-cooled heat exchanger 3 is located is provided with a first solenoid valve 16, and the branch on which the evaporative cooling heat exchanger 4 is located is provided with a second solenoid valve 17. The switching of the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4 is realized by switching the first electromagnetic valve 16 and the second electromagnetic valve 17. Through the arrangement, the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4 are convenient to switch.

In another embodiment, in a second specific embodiment, the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4 are connected in series. The common application or common stopping of the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4 is realized by connecting electromagnetic valves in series on the flow paths of the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4. In this operation, the unit can be made to connect the air-cooled heat exchanger 3 in series before the evaporation Leng Huanre unit 4 in the heating mode. That is, the refrigerant exchanges heat through the air-cooled heat exchanger 3 and then exchanges heat through the evaporative cooling heat exchanger 4. The refrigerant absorbs heat and primarily heats up through the air-cooled heat exchanger 3, and then in the process of heat exchange through the evaporative cooling heat exchanger 4, the superheat degree is further improved, so that the efficiency under the low-temperature working condition is improved, and the heating performance is ensured.

In this embodiment, the evaporative cooling heat exchange unit includes an air cooling assembly and an evaporative cooling assembly; the air cooling assembly comprises an air cooling heat exchanger 3 and a fan 11 for enabling air to flow through the air cooling heat exchanger 3; the evaporative cooling assembly comprises an evaporative cooling heat exchanger 4 and a spraying assembly for spraying cooling water to the evaporative cooling heat exchanger 4. Thereby effectively ensuring the heat exchange effect.

As shown in fig. 16, in the first embodiment, the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4 are connected in parallel, and a first type first electromagnetic valve 16a is provided on the branch where the air-cooled heat exchanger 3 is located, and a first type second electromagnetic valve 17a is provided on the branch where the evaporative cooling heat exchanger 4 is located. The switching between the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4 is achieved by switching between the first type first solenoid valve 16a and the first type second solenoid valve 17a.

Through the arrangement, the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4 are conveniently switched, so that functions can be conveniently switched.

As shown in fig. 17, in the second embodiment, the air-cooled heat exchanger 3 is disposed in series with the evaporative cooling heat exchanger 4, one end of the air-cooled heat exchanger 3 has a second type first electromagnetic valve 16b, one end of the evaporative cooling heat exchanger 4 is connected to one side of the second type first electromagnetic valve 16b through a second type second electromagnetic valve 17b, and the other end of the evaporative cooling heat exchanger 4 is connected to the other side of the second type first electromagnetic valve 16 b. By the above arrangement, the switching of the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4 can be achieved as well.

As shown in fig. 18, in the third embodiment, the air-cooled heat exchanger 3 is disposed in series with the evaporative cooling heat exchanger 4, one end of the evaporative cooling heat exchanger 4 has a third type first electromagnetic valve 16c, one end of the air-cooled heat exchanger 3 is connected to one side of the third type first electromagnetic valve 16c through a third type second electromagnetic valve 17c, and the other end of the air-cooled heat exchanger 3 is connected to the other side of the third type first electromagnetic valve 16 c. By the above arrangement, the switching of the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4 can be achieved as well.

It will be appreciated that in the structure in which the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4 are connected in series, and in the heating mode, the air-cooled heat exchanger 3 is connected in series before the evaporative Leng Huanre heat exchanger 4, in the cooling mode, the refrigerant exchanges heat through the evaporative cooling heat exchanger 4 and then exchanges heat through the air-cooled heat exchanger 3. Through the arrangement, after the refrigerant is subjected to heat dissipation and temperature reduction through the evaporative cooling heat exchanger 4, the refrigerant is subjected to heat dissipation and temperature reduction through the air cooling heat exchanger 3, so that the refrigeration efficiency is effectively ensured.

Further, the air-cooled heat exchanger 3 may be a fin type heat exchanger. So as to ensure the heat exchange effect and realize the cold and warm bidirectional effect of the air-cooled heat exchanger. Further, the air-cooled heat exchanger 3 is a fin type heat exchanger. The evaporative cooling heat exchanger 4 may be a plate-and-tube plate heat exchanger. Reducing the probability of fouling of the evaporative cooling heat exchanger 4.

In this embodiment, the spray assembly includes a spray pump 12 and a sprayer 13 provided with a nozzle, and a liquid outlet of the spray pump 12 is communicated with the sprayer 13. By activating the shower water pump 12, water is supplied to the shower 13.

As shown in fig. 8-12, the evaporative cooling low-temperature total heat recovery air-cooled heat pump unit further comprises an outdoor unit housing and two outer guard plates 32 positioned in the outdoor unit housing, and a cavity for accommodating the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4 is formed between the two outer guard plates 32 and the top wall and the bottom wall of the outdoor unit housing; the cavity wall of the cavity is provided with an air inlet and an air outlet.

Through the arrangement, the heat exchange effect is effectively ensured.

Further, the air inlet is positioned at the top of the cavity, and the air outlet is positioned at the bottom of the cavity.

In this embodiment, the air-cooled heat exchanger 3 is located above the evaporative cold heat exchanger 4. Through the arrangement, the external cooling air can cool the air-cooled heat exchanger 3 directly conveniently, the obstruction of the evaporative cooling heat exchanger 4 is avoided, and the heat exchange effect is further improved.

Wherein the air-cooled heat exchanger 3 is positioned above the evaporation cold heat exchanger 4. Of course, other structures may be provided, and the air-cooled heat exchanger 3 may be located below the evaporative cold heat exchanger 4.

As can be seen from the description of fig. 17 and 18, the two arrangements can realize heat exchange operation, wherein the difference of the pipe connection layout is only used for adjusting the positions of the refrigerant entering the air-cooled heat exchanger 3 and the evaporation-cooled heat exchanger 4. And further, different arrangement modes are selected according to actual requirements, which are not specifically shown herein and are all within a protection range.

Preferably, a filter 30 is also arranged in the cavity, and the filter 30 is positioned between the air-cooled heat exchanger 3 and the evaporative cooling heat exchanger 4. Through the arrangement, external impurities are prevented from falling onto the evaporative cooling heat exchanger 4, and cleanliness in the spraying process is ensured.

It will be appreciated that in embodiments where the spray assembly includes a spray pump 12 and a sprayer 13 provided with a nozzle, the sprayer 13 is located within the cavity and the sprayer 13 is located below the filter 30.

Specifically, as shown in fig. 9, the outdoor unit casing includes a frame 42, and an outer cover 32 and a grill 41 provided on the frame 42, and the air inlet is formed by the grill 41.

Specifically, as shown in fig. 10 and 11, the air-cooled heat exchanger 3 is an inverted V-shaped air-cooled fin heat exchanger. The air-cooled heat exchanger 3 may be provided as an inverted V-shaped fin type heat exchanger. And the two side surfaces of the inverted V-shaped structure face the air inlet, the bottom surface of the V-shaped structure faces downwards and the tip upwards, and the whole inverted V-shaped structure is formed. The water tank 35, the electric cabinet 43 and the area a for placing other components are arranged side by side at the bottom of the outdoor unit casing. A return pipe c and a water supply pipe d are provided.

Specifically, the aforementioned shower 13 is also disposed in the first accommodation chamber a, and is located between the air-cooled heat exchanger 3 and the evaporative cold heat exchanger 4. The air-cooled evaporative low-temperature heat pump total heat recovery unit further comprises a filter 30 for filtering out impurities in the air, and the filter 30 is also arranged in the first accommodating cavity a and is positioned between the air-cooled heat exchanger 3 and the sprayer 13.

Further, as shown in fig. 7, an air outlet passage is formed between the side wall of the outdoor unit casing and the outer cover 32, and the fan 11 is located in the air outlet passage. Further, the fans 11 are all located near the outlet of the air outlet channel.

In the air cooling evaporation cooling low-temperature heat pump total heat recovery unit provided by the embodiment, the air cooling evaporation cooling low-temperature heat pump total heat recovery unit further comprises a water receiver 31 arranged in an air outlet channel; the outdoor unit casing is internally provided with a water tank 35, the spray assembly comprises a spray water pump 12 and a sprayer 13 provided with a nozzle, and a liquid inlet of the spray water pump 12 is communicated with the water tank 35; the water collecting outlet of the water collector is provided corresponding to the opening of the water tank 35. The water collected by the water collector falls back to the water tank 35 so as to be absorbed by the spray water pump 12, thereby forming recycling and reducing the loss of cooling water.

Further, the water tank 35 further comprises a float valve 33 and a water supplementing port 34.

The outdoor unit casing is internally provided with an air duct 22, and a connecting pipeline between the sprayer 13 and the spray water pump 12 is positioned in the air duct 22.

Further, a first circulating pump 27 is communicated with a heat exchange water inlet or a heat exchange water outlet of the first heat exchanger 26. The first heat exchanger 26 can be a living hot water side heat exchanger, and is used for meeting living hot water requirements.

Further, a second circulation pump 28 is connected to the heat exchange water inlet or the heat exchange water outlet of the second heat exchanger 9. The second heat exchanger 9 may be an air-conditioning side heat exchanger for adjusting the indoor temperature.

As shown in fig. 6, the outdoor unit casing has a region a in which the compressor 1, the first four-way valve 2, the accumulator 5 of the air-cooled heat exchanger 3, the dry filter 6, the second expansion valve 7, the first solenoid valve 16 and the second solenoid valve 17 of the gas-liquid separator 10, and the like can be placed. Wherein a is a steam inlet, and b is a liquid outlet.

Further, the air-cooled evaporative cooling low-temperature heat pump total heat recovery unit in the embodiment further comprises a gas-liquid separator 10, and the third port C of the first four-way valve 2 and the first port a of the second four-way valve 29 are communicated with the reflux port through the gas-liquid separator 10. By providing the gas-liquid separator 10, stable operation of the compressor 1 is ensured.

Still further, a drier-filter 6 is included, and the reservoir 5 is communicated with a fourth connection port of the economizer 14 and a third solenoid valve 15 through the drier-filter 6. The service life of the compressor 1 is effectively prolonged by the filtering action of the filter drier 6 on the refrigerant.

Of course, the unit can also be applied to an evaporative cooling low-temperature type total heat recovery air-cooled heat pump unit of a primary compressor with a non-secondary enthalpy-increasing value. The flow of this embodiment is shown in fig. 13.

The heat pump unit may be configured as an evaporative cooling low-temperature type total heat recovery multiple heat pump unit as shown in fig. 14 or a general type evaporative cooling total heat recovery multiple heat pump unit as shown in fig. 15.

The compressor 1 in the embodiment of the invention can also adopt a screw type single-stage or jet culvert-increasing compressor.

The air cooling evaporation cold low-temperature type heat pump total heat recovery unit provided by the invention is described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims

1. The evaporative cooling low-temperature type total heat recovery air-cooled multi-connected heat pump unit is characterized by comprising a compressor (1), a first four-way valve (2), an evaporative cooling heat exchange unit, a second heat exchanger (9), a first heat exchanger (26), a second four-way valve (29), a fourth electromagnetic valve (22), a fifth electromagnetic valve (23), a sixth electromagnetic valve (24), a seventh electromagnetic valve (25), a liquid reservoir (5), a first expansion valve (8), an economizer (14), a third electromagnetic valve (15), a second one-way valve (18), a third one-way valve (19), a first one-way valve (20) and a fourth one-way valve (21);

the compressor (1) is provided with a return flow port and a discharge port; the first heat exchanger (26) and the second heat exchanger (9) are respectively provided with a heat exchange water inlet and a heat exchange water outlet;

the first port A of the first four-way valve (2) is communicated with the outflow port, the second port B of the first four-way valve (2) is communicated with one end of the first heat exchanger (26), the third port C of the first four-way valve (2) and the first port A of the second four-way valve (29) are communicated with the backflow port, the fourth port D of the first four-way valve (2) is communicated with the third port C of the second four-way valve (29), the second port B of the second four-way valve (29) is communicated with one end of the evaporative cooling heat exchange unit, and the fourth port D of the second four-way valve (29) is communicated with one end of the second heat exchanger (9);

The other end of the first heat exchanger (26) is communicated with the liquid storage device (5) through the seventh electromagnetic valve (25) and the first one-way valve (20), and the liquid storage device (5) is communicated with the first expansion valve (8); the first expansion valve (8) is communicated with the other end of the second heat exchanger (9) through the second one-way valve (18);

the other end of the evaporative cooling heat exchange unit is communicated with the other end of the second heat exchanger (9) through the fifth electromagnetic valve (23); the other end of the evaporative cooling heat exchange unit is also communicated with the other end of the first heat exchanger (26) through the fourth electromagnetic valve (22);

the other end of the second heat exchanger (9) is also communicated with the liquid reservoir (5) through the sixth electromagnetic valve (24) and the fourth one-way valve (21); the first expansion valve (8) is also communicated with the other end of the evaporative cooling heat exchange unit through the third one-way valve (19);

the second heat exchangers (9) are connected in parallel and provided with a plurality of groups.

2. The evaporative cooling low-temperature type total heat recovery air-cooled multi-connected heat pump unit according to claim 1, further comprising a second expansion valve (7) and an economizer (14);

the compressor (1) is also provided with an EVI jet orifice, and the economizer (14) is provided with a first connecting port and a second connecting port which are communicated with each other, and a third connecting port and a fourth connecting port which are communicated with each other;

The communication structure of the liquid reservoir (5) and the first expansion valve (8) is as follows: the liquid storage device (5) is communicated with a fourth connecting port of the economizer (14), and the liquid storage device (5) is communicated with a first connecting port of the economizer (14) through the third electromagnetic valve (15) and the second expansion valve (7); a second connection port of the economizer (14) communicates with the EVI injection port; the first connection port communicates with the first expansion valve (8).

3. The evaporative cooling low-temperature type total heat recovery air-cooled multi-connected heat pump unit according to claim 1, wherein the evaporative cooling heat exchange unit comprises an air cooling assembly and an evaporative cooling assembly;

the air cooling assembly comprises an air cooling heat exchanger (3) and a fan (11) for enabling air to flow through the air cooling heat exchanger (3);

the evaporation cooling assembly comprises an evaporation cooling heat exchanger (4) and a spraying assembly for spraying cooling water to the evaporation cooling heat exchanger (4).

4. The evaporative cooling low-temperature type total heat recovery air-cooled multi-connected heat pump unit according to claim 3, wherein the air-cooled heat exchanger (3) is arranged in parallel with the evaporative cooling heat exchanger (4), a first type electromagnetic valve (16 a) is arranged at one end of the air-cooled heat exchanger (3), and a first type second electromagnetic valve (17 a) is arranged at one end of the evaporative cooling heat exchanger (4);

Or, the air-cooled heat exchanger (3) is arranged in series with the evaporative cooling heat exchanger (4), one end of the air-cooled heat exchanger (3) is provided with a second type first electromagnetic valve (16 b), one end of the evaporative cooling heat exchanger (4) is connected to one side of the second type first electromagnetic valve (16 b) through a second type second electromagnetic valve (17 b), and the other end of the evaporative cooling heat exchanger (4) is connected to the other side of the second type first electromagnetic valve (16 b);

or, the air-cooled heat exchanger (3) and the evaporation cold heat exchanger (4) are arranged in series, one end of the evaporation cold heat exchanger (4) is provided with a third type first electromagnetic valve (16 c), one end of the air-cooled heat exchanger (3) is connected to one side of the third type first electromagnetic valve (16 c) through a third type second electromagnetic valve (17 c), and the other end of the air-cooled heat exchanger (3) is connected to the other side of the third type first electromagnetic valve (16 c).

5. The evaporative cooling low-temperature type total heat recovery air-cooled multi-connected heat pump unit according to claim 3, wherein the spraying assembly comprises a spraying water pump (12) and a sprayer (13) provided with a nozzle, and a liquid outlet of the spraying water pump (12) is communicated with the sprayer (13).

6. The evaporative cooling low-temperature type total heat recovery air-cooled multiple heat pump unit according to claim 3, further comprising an outdoor unit housing and two outer guard plates (32) positioned in the outdoor unit housing, wherein a cavity for accommodating the air-cooled heat exchanger (3) and the evaporative cooling heat exchanger (4) is formed between the two outer guard plates (32) and the top wall and the bottom wall of the outdoor unit housing;

The cavity wall of the cavity is provided with an air inlet and an air outlet.

7. The evaporative cooling low-temperature type total heat recovery air-cooled multi-connected heat pump unit according to claim 6, wherein an air outlet channel is formed between the side wall of the outdoor unit casing and the outer guard plate (32), and the fan (11) is located in the air outlet channel;

the water collector (31) is arranged in the air outlet channel;

the outdoor unit comprises a shell, a water tank (35) and a spray assembly, wherein the spray assembly comprises a spray water pump (12) and a sprayer (13) provided with a nozzle, and a liquid inlet of the spray water pump (12) is communicated with the water tank (35);

the water collecting outlet of the water collector (18) is arranged corresponding to the opening of the water tank (35).

8. The evaporative cooling low-temperature type total heat recovery air-cooled multi-connected heat pump unit according to any one of claims 1 to 7, wherein a heat exchange water inlet or a heat exchange water outlet of the first heat exchanger (26) is communicated with a first circulating pump (27);

and/or a heat exchange water inlet or a heat exchange water outlet of the second heat exchanger (9) is communicated with a second circulating pump (28).

9. The evaporative cooling low-temperature type total heat recovery air-cooled multiple heat pump assembly as recited in any one of claims 1-7, further comprising a dry filter (6), wherein the dry filter (6) is disposed at an outlet of the reservoir (5).

10. The evaporative cooling low-temperature type total heat recovery air-cooled multi-connected heat pump unit according to any one of claims 1 to 7, further comprising a gas-liquid separator (10), wherein the third port C of the first four-way valve (2) and the first port a of the second four-way valve (29) are communicated with the return port through the gas-liquid separator (10).