CN107238152A - A kind of variable-frequency multi-connection type fluorine water system - Google Patents

Abstract

The application provides a frequency conversion multi-connected fluorine water system, which includes a central air-conditioning system and a floor heating system. The floor heating system includes a heat exchange component and a floor heating component connected with the heat exchange component. The heat exchange assembly includes a floor heating solenoid valve, a water side heat exchanger, a first floor heating one-way valve, a hot water side liquid reservoir, and a second floor heating one-way valve connected in series, and each element is connected through a pipeline. The floor heating assembly is connected to the water-side heat exchanger, wherein the floor heating solenoid valve and the second floor heating check valve are connected to the central air-conditioning system through pipelines. The refrigerant of the central air-conditioning system flows along the heat exchange component and performs heat exchange at the water-side heat exchanger, so as to provide thermal energy to the floor heating component. A floor heating system is added to VRF products to realize one machine with multiple functions and good energy-saving performance.

Description

A frequency conversion multi-connected fluorine water system

technical field

The application belongs to the technical field of combined heating and cooling systems, and relates to a variable frequency multi-connected fluorine water system.

Background technique

VRF (Variable Refrigerant Flow) system refers to the system configuration including one outdoor condenser and multiple indoor units. The system adopts the frequency conversion control method to control the speed of the compressor in the outdoor unit according to the number of indoor units turned on, so as to control the flow of refrigerant. When the indoor load becomes high, a large amount of refrigerant is sent to the indoor unit to provide more cooling/heating.

With people's pursuit of the quality of life at home and the improvement of energy conservation and environmental protection awareness, it is necessary to improve the utilization rate of energy, and some heat will be wasted due to excess heat during the operation of the VRF system. At the same time, as the proportion of the floor heating system used in the home environment gradually increases, it needs to consume a lot of energy to meet the normal heating requirements of the system. Moreover, the heating system used for heating water in the floor heating system occupies a relatively large installation space, which reduces the space utilization rate of the building.

Contents of the invention

In view of this, the present application provides a frequency conversion multi-connected fluorine water system.

Specifically, the present application is achieved through the following technical solutions: a frequency conversion multi-connected fluorine water system, which includes a central air-conditioning system and a floor heating system connected to the central air-conditioning system;

The floor heating system includes a heat exchange assembly connected to the central air-conditioning system, and a floor heating assembly connected to the heat exchange assembly. The heat exchange assembly includes a floor heating solenoid valve connected in series, a water side heat exchanger, a second A floor heating one-way valve, a hot water side reservoir, a second floor heating one-way valve, all components are connected through pipelines;

The floor heating assembly is connected to the water-side heat exchanger, wherein the floor heating solenoid valve and the second floor heating check valve are connected to the central air conditioning system through pipelines;

The refrigerant of the central air-conditioning system flows along the heat exchange component and performs heat exchange at the water-side heat exchanger, so as to provide thermal energy to the floor heating component.

Optionally, the floor heating component includes a first control valve connected to the water-side heat exchanger, a second control valve connected to the water-side heat exchanger, and a second control valve connected to the first control valve and the The second control valves are respectively connected to water-water heat exchangers, and the water-water heat exchangers are used for heat exchange.

Optionally, both the first control valve and the second control valve are three-way valves, the first control valve is connected to a water inlet pipe, and the second control valve is connected to a water outlet pipe.

Optionally, an inlet water pump is provided between the second control valve and the water-side heat exchanger.

Optionally, the central air-conditioning system includes an inverter compressor, an air-conditioning solenoid valve, a four-way reversing valve, a fin heat exchanger, an inverter fan, an outdoor electronic expansion valve assembly, an indoor unit assembly, a gas-liquid separator, and various components Connected through pipelines; the air conditioner solenoid valve, four-way reversing valve, fin heat exchanger, outdoor electronic expansion valve assembly, and indoor unit assembly are connected in series; the inlet of the gas-liquid separator is connected to the four-way reversing The valves are connected, and the outlet of the gas-liquid separator is connected with the inlet of the frequency conversion compressor.

Optionally, the air conditioner solenoid valve is connected in parallel with the floor heating solenoid valve, and both the air conditioner solenoid valve and the floor heating solenoid valve are connected to the outlet of the frequency conversion compressor; the second floor heating check valve is connected to the outdoor electronic expansion valve assembly and On the piping between the indoor unit components.

Optionally, the four-way reversing valve includes a first joint, a second joint, a third joint and a fourth joint; the air conditioner solenoid valve is connected to the first joint, and the fin heat exchanger is connected to the The second joint, the gas-liquid separator is connected to the third joint, and the indoor unit assembly is connected to the fourth joint.

Optionally, the indoor unit assembly includes at least one indoor unit heat exchanger arranged in parallel, the indoor unit heat exchanger includes a first pipeline and a second pipeline, and an indoor Electromechanical expansion valve.

Optionally, the indoor unit assembly includes a first collecting pipe connected to the outdoor electronic expansion valve assembly, and a second collecting pipe connected to the four-way reversing valve, and the first pipeline is connected to the The first collecting pipe, the second pipeline is connected to the second collecting pipe.

Optionally, the outdoor electronic expansion valve assembly includes an outdoor electronic expansion valve and an outdoor one-way valve arranged in parallel with the outdoor electronic expansion valve, and the outdoor one-way valve is connected from the fin heat exchanger to the indoor unit. Component direction conduction.

The technical solutions provided by the embodiments of the present application may include the following beneficial effects:

By adding a hot water heating circuit and a heat recovery circuit in the VRF system, the VRF system is used to provide heating water and recover heat during system operation, thereby improving energy utilization. The function of hot water and floor heating is added to VRF products to realize one machine with multiple functions, and the energy-saving performance is good. The floor heating system that cancels the fan coil unit for heating with high water temperature and adopts the indoor unit heat exchanger can meet the heating demand of low temperature. Heat exchange with the room is carried out through the middle water side heat exchanger, so that the floor heating system can operate without occupying a large installation space. The space utilization rate of the building is high, and the application range of the VRF system is further expanded.

Description of drawings

Fig. 1 is a schematic diagram of pipeline connection of a variable frequency multi-connected fluorine water system shown in an exemplary embodiment of the present application.

Fig. 2 is a schematic connection diagram of a floor heating system shown in an exemplary embodiment of the present application.

In the figure, inverter compressor 1; air conditioner solenoid valve 2; four-way reversing valve 3; first joint 3a; second joint 3b; third joint 3c; fourth joint 3d; fin heat exchanger 4; frequency conversion fan 5 ; outdoor electronic expansion valve assembly 6; outdoor electronic expansion valve 6a; outdoor one-way valve 6b; indoor unit assembly 7; indoor unit heat exchanger 7a; first pipeline 7b; second pipeline 7c; indoor unit electronic expansion valve 7d ; the first collecting pipe 7e; the second collecting pipe 7f; the gas-liquid separator 8; the floor heating solenoid valve 9; the water side heat exchanger 10; the first control valve 11; Two control valves 12; first water outlet pipe 12a; second water outlet pipe 12b; first floor heating check valve 13; hot water side reservoir 14; second floor heating check valve 15; water inlet pump 16; water heat exchange device 17.

detailed description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of the present application, first information may also be called second information, and similarly, second information may also be called first information. Depending on the context, the word "if" as used herein may be interpreted as "at" or "when" or "in response to a determination."

As shown in FIG. 1 , in an exemplary implementation, a variable frequency multi-connected fluorine water system is disclosed, the system includes a central air-conditioning system and a floor heating system connected to the central air-conditioning system. Among them, the central air conditioner is used for cooling and heating. At the same time, the heating performance of the central air conditioning system is used to heat hot water or recover part of the heat energy, and transfer the heat energy to the floor heating system in the form of water-to-water heat exchange.

The central air-conditioning system includes frequency conversion compressor 1, air conditioning solenoid valve 2, four-way reversing valve 3, fin heat exchanger 4, frequency conversion fan 5, outdoor electronic expansion valve assembly 6, indoor unit assembly 7, gas-liquid separator 8, All components are connected by pipelines. Air conditioning solenoid valve 2, four-way reversing valve 3, finned heat exchanger 4, outdoor electronic expansion valve assembly 6, and indoor unit assembly 7 are connected in series; the inlet of gas-liquid separator 8 is connected to four-way reversing valve 3 , the outlet of the gas-liquid separator 8 is connected with the inlet of the inverter compressor 1 . Wherein, the outdoor electronic expansion valve assembly 6 includes an outdoor electronic expansion valve 6a, and an outdoor one-way valve 6b arranged in parallel with the outdoor electronic expansion valve 6a. The outdoor one-way valve 6b leads from the finned heat exchanger 4 to the indoor unit assembly 7 .

The central air-conditioning system is a VRF system, wherein the finned heat exchanger 4 and the frequency conversion fan 5 form an outdoor condenser. The indoor unit assembly 7 includes a plurality of parallel indoor unit heat exchangers 7a, which are correspondingly arranged in corresponding spaces of the building, for example, the indoor unit heat exchangers 7a are arranged in indoor spaces such as rooms, living rooms, and studios. The indoor unit assembly 7 controls the operation of the inverter compressor 1, the switching of the four-way reversing valve 3 between channels, and the cooperation of other components to perform cooling or heating and other working modes. Since the IPLV(C) (Integrated Part Load Value) refrigeration comprehensive performance of the VRF system is higher than that of the water machine system, at the same time, in the cooling process of the VRF system, the VRF system does not have the energy consumption of the water pump, which makes the whole system more energy-saving.

The four-way reversing valve 3 is used to control and adjust the flow direction of the refrigerant in the system, so that the system can operate in refrigeration and refrigeration and other working modes. Wherein, the four-way reversing valve 3 includes a first joint 3a, a second joint 3b, a third joint 3c and a fourth joint 3d. The air conditioner solenoid valve 2 is connected to the first joint 3a, the fin heat exchanger 4 is connected to the second joint 3b, the gas-liquid separator 8 is connected to the third joint 3c, and the indoor unit assembly 7 is connected to the fourth joint 3d. Between the fourth joint 3d and the third joint 3c, a suction one-way valve and a suction solenoid valve connected in series are arranged, and the suction one-way valve leads from the fourth joint 3d to the third joint 3c.

For example, in cooling mode, the refrigerant flows in from the first joint 3a, flows out from the second joint 3b, flows in through the fourth joint 3d, and then flows out from the third joint 3c. During the cycle, the refrigerant flows through each joint of the four-way reversing valve 3 in sequence, so that the refrigerant flows through each component of the central air-conditioning system and completes the cycle. The refrigerant absorbs the indoor heat after being vaporized in the indoor unit assembly 7, so as to reduce the indoor temperature and achieve the cooling effect.

The indoor unit assembly 7 is located in the indoor space where heat exchange is required, and is an important element for the heat exchange between the refrigerant and the indoor air. In the VRF system, the indoor unit assembly 7 includes at least one indoor unit heat exchanger 7a. When the number of indoor unit heat exchangers 7a is more than two, the indoor unit heat exchangers 7a are arranged in parallel. Each indoor unit heat exchanger 7a includes a first pipeline 7b and a second pipeline 7c, and an indoor unit electronic expansion valve 7d arranged on the first pipeline 7b. The first pipeline 7b and the second pipeline 7c are the output or input parts of the indoor unit heat exchanger 7a, and the refrigerant enters the indoor unit heat exchanger 7a from the first pipeline 7b or the second pipeline 7c, and from The other outputs the indoor unit heat exchanger 7a.

The indoor unit assembly 7 includes a first collecting pipe 7e connected to the outdoor electronic expansion valve assembly 6 , and a second collecting pipe 7f connected to the four-way reversing valve 3 . The first pipeline 7b is connected to the first header 7e, and the second pipeline 7c is connected to the second header 7f.

When the number of indoor unit heat exchangers 7a is more than two, the refrigerant is diverted to the first pipeline 7b through the first collecting pipe 7e, or is collected to the first collecting pipe 7e through the first pipeline 7b. Correspondingly, the refrigerant passing through the second pipeline 7c is collected to the second collection pipe 7f, or the second collection pipe 7f is divided into the second pipe 7c.

The central air-conditioning system has two working modes of cooling and heating, and the flow cycle process of the internal refrigerant is as follows:

a.VRF cooling mode: inverter compressor 1 exhaust—air conditioner solenoid valve 2—four-way reversing valve 3—fin heat exchanger 4—outdoor electronic expansion valve 6a and parallel outdoor one-way valve 6b—indoor unit electronic expansion Valve 7d throttling—indoor unit heat exchanger 7a—four-way reversing valve 3—gas-liquid separator 8—intake port of frequency conversion compressor 1.

b.VRF heating mode: inverter compressor 1 exhaust—air conditioner solenoid valve 2—four-way reversing valve 3—indoor unit heat exchanger 7a—indoor unit electronic expansion valve 7d—outdoor electronic expansion valve 6a throttling—fin Heat exchanger 4—four-way reversing valve 3—gas-liquid separator 8—suction port of frequency conversion compressor 1.

As shown in Figure 2, the central air conditioning system is connected to the floor heating system, and the floor heating system includes a heat exchange component connected to the central air conditioning system, and a floor heating component connected to the heat exchange component. The heat exchange components are connected to the central air-conditioning system and form a loop with some components on the central air-conditioning system to form working modes such as hot water heating/floor heating and heat recovery. The floor heating component is used for connecting with the heat exchanging component and exchanging heat, so that the heat generated on the heat exchanging component is transferred to the floor heating component.

The heat exchange assembly includes a floor heating solenoid valve 9, a water side heat exchanger 10, a first floor heating check valve 13, a hot water side liquid reservoir 14, and a second floor heating check valve 15, and all components are connected by pipelines.

Wherein: the air conditioner solenoid valve 2 and the floor heating solenoid valve 9 are connected in parallel, and both the air conditioner solenoid valve 2 and the floor heating solenoid valve 9 are connected to the outlet of the frequency conversion compressor 1 . The floor heating solenoid valve 9, the water side heat exchanger 10, the first floor heating check valve 13, the hot water side reservoir 14, and the second floor heating check valve 15 are connected in series, and connected to the outdoor electronic expansion valve assembly 6 and the indoor On the pipeline between the machine components 7. In the cooling or heating mode of the VRF system, the floor heating solenoid valve 9 in the floor heating system is closed.

The floor heating component includes a first control valve 11 connected to the water-side heat exchanger 10, a second control valve 12 connected to the water-side heat exchanger 10, and water valves respectively connected to the first control valve 11 and the second control valve 12. Water heat exchanger 17. Wherein, the water-side heat exchanger 10 is used for heat exchange with the intermediate medium water, and the water-water heat exchanger 17 is used for heat exchange with the indoor space. The first control valve 11 is installed on the water inlet of the water side heat exchanger 10 , and the second control valve 12 is installed on the water outlet of the water side heat exchanger 10 . Optionally, both the first control valve 11 and the second control valve 12 are three-way valves, such as water-side flow proportional regulating valves or electric valves.

An inlet water pump 16 is provided between the second control valve 12 and the water side heat exchanger 10 . By setting the water inlet pump 16, the water inlet speed of the water side heat exchanger 10 can be increased, and the circulation speed of the intermediate medium water in the pipeline in the water-water heat exchanger 17 can be improved, and the relationship between the water-water heat exchanger 17 and the indoor space can be improved. heat exchange efficiency, and the heat exchange efficiency between the water-side heat exchanger 10 and the intermediate medium water.

The central air-conditioning system is combined with the heat exchange components to form two working modes: hot water/floor heating mode and heat recovery mode. The internal refrigerant flow cycle process is as follows:

c. Hot water/floor heating mode: Inverter compressor 1 exhaust—floor heating solenoid valve 9—water side heat exchanger 10—first floor heating check valve 13—hot water side reservoir 14—second floor heating check valve 15—Outdoor unit electronic expansion valve throttling—Fin heat exchanger 4—Four-way reversing valve 3—Gas-liquid separator 8—Intake port of inverter compressor 1. In hot water/floor heating mode, air conditioner solenoid valve 2 is closed.

d. Heat recovery mode: inverter compressor 1 exhaust—floor heating solenoid valve 9—water side heat exchanger 10—first floor heating check valve 13—hot water side reservoir 14—second floor heating check valve 15—indoor Electromechanical expansion valve 7d throttling—indoor unit heat exchanger 7a—four-way reversing valve 3—gas-liquid separator 8—intake port of frequency conversion compressor 1. In heat recovery mode, air conditioner solenoid valve 2 is closed.

The refrigerant transfers heat to the floor heating component through the water-side heat exchanger 10 in the heat exchange component and some pipelines of the central air-conditioning system. Among them, the intermediate heat exchange medium water can directly come from domestic hot water, and the combination of the central air-conditioning system and the floor heating system is used to realize heat transfer, and the heat transfer effect of the floor heating system is good. The central air-conditioning system combined with the floor heating system saves the installation space of the floor heating system, realizes the multi-purpose effect of one machine, and improves the utilization rate of the system.

In the floor heating mode, the high-pressure and high-temperature refrigerant output by the inverter compressor 1 is used for heat exchange through the water-side heat exchanger 10. The VRF system and the floor heating system realize full heat exchange. The heat that the floor heating system can obtain is sufficient, and the temperature of the floor heating water rises. Quick, high temperature. In the heat recovery mode, the heat discharged from the VRF system to the outside is recovered through the water-side heat exchanger 10 to produce domestic hot water, and the energy utilization rate is high.

In the hot water/floor heating mode, the water-side heat exchanger 10 heats the intermediate heat exchange medium water, and by switching the output ports of the first control valve 11 and the second control valve 12, the flow direction of the intermediate heat exchange medium water can be controlled, so that The intermediate heat-exchanging medium water chooses to enter the floor heating component or output in the form of hot water, so as to realize the function of floor heating or heating water. Correspondingly, the first water inlet pipe 11a and the second water inlet pipe 11b are connected to the first control valve 11, and the first water outlet pipe 12a and the second water outlet pipe 12b are connected to the second control valve 12, wherein the first water inlet pipe 11a and the first water outlet pipe 12a are used to output the intermediate heat exchange medium water in the form of hot water. The second water inlet pipe 11b and the second water outlet pipe 12b are used to input and output the intermediate heat exchange medium water into and out of the water-to-water heat exchanger 17, so that the water-to-water heat exchanger 17 can complete heat exchange with the indoor space and realize the floor heating function.

It is worth mentioning that this frequency conversion multi-connected fluorine water system is used as a VRF+ floor heating system: it can realize VRF cooling, VRF heating, floor heating, VRF heating + floor heating and other working modes.

The frequency conversion multi-connected fluorine water system is a heat recovery multi-connected system: it can realize VRF cooling, VRF heating, hot water heating, heat recovery, VRF heating + hot water heating and other working modes.

The frequency conversion multi-connected fluorine water system is a hybrid multi-connected triple supply system: it can realize VRF cooling, VRF heating, floor heating, VRF heating + floor heating, hot water heating, heat recovery, VRF heating + hot water heating, Floor heating + hot water heating and other working modes. Moreover, since this system does not need to be equipped with fan coil units, the floor heating system required for low-temperature heating can exchange heat with the room through the water-to-water heat exchanger 17 in the middle. By switching the first control valve 11 and the second control valve 12 and related logic control, floor heating and hot water heating can be satisfied at the same time, and the application effect is good.

The above are only preferred embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the protection of the application. within range.

Claims (10)

1. A frequency conversion multi-connected fluorine water system is characterized in that the system includes a central air-conditioning system and a floor heating system connected to the central air-conditioning system; The floor heating system includes a heat exchange assembly connected to the central air-conditioning system, and a floor heating assembly connected to the heat exchange assembly. The heat exchange assembly includes a floor heating solenoid valve connected in series, a water side heat exchanger, a second A floor heating one-way valve, a hot water side reservoir, a second floor heating one-way valve, all components are connected through pipelines; The floor heating assembly is connected to the water-side heat exchanger, wherein the floor heating solenoid valve and the second floor heating check valve are connected to the central air conditioning system through pipelines; The refrigerant of the central air-conditioning system flows along the heat exchange component and performs heat exchange at the water-side heat exchanger, so as to provide thermal energy to the floor heating component. 2. The system according to claim 1, wherein the floor heating component comprises a first control valve connected to the water-side heat exchanger, a second control valve connected to the water-side heat exchanger, And a water-to-water heat exchanger connected to the first control valve and the second control valve respectively, and the water-to-water heat exchanger is used for heat exchange. 3. The system according to claim 2, wherein both the first control valve and the second control valve are three-way valves, the first control valve is connected to a water inlet pipe, and the second control valve is connected to There is a water outlet. 4. The system according to claim 2, characterized in that a water inlet pump is provided between the second control valve and the water side heat exchanger. 5. The system according to claim 1, characterized in that, the central air-conditioning system includes a frequency conversion compressor, an air conditioning solenoid valve, a four-way reversing valve, a fin heat exchanger, a frequency conversion fan, an outdoor electronic expansion valve assembly, The components of the indoor unit and the gas-liquid separator are connected through pipelines; the air conditioner solenoid valve, the four-way reversing valve, the fin heat exchanger, the outdoor electronic expansion valve component, and the indoor unit component are connected in series; the The inlet of the gas-liquid separator is connected with the four-way reversing valve, and the outlet of the gas-liquid separator is connected with the inlet of the frequency conversion compressor. 6. The system according to claim 5, wherein the air conditioner solenoid valve and the floor heating solenoid valve are connected in parallel, and both the air conditioner solenoid valve and the floor heating solenoid valve are connected to the outlet of the frequency conversion compressor; the second floor heating solenoid valve The one-way valve is connected to the pipeline between the outdoor electronic expansion valve assembly and the indoor unit assembly. 7. The system according to claim 5, wherein the four-way reversing valve comprises a first joint, a second joint, a third joint and a fourth joint; the air conditioner solenoid valve is connected to the first joint, The fin heat exchanger is connected to the second joint, the gas-liquid separator is connected to the third joint, and the indoor unit assembly is connected to the fourth joint. 8. The system according to claim 5, wherein the indoor unit assembly comprises at least one indoor unit heat exchanger arranged in parallel, and the indoor unit heat exchanger comprises a first pipeline and a second pipeline, And the electronic expansion valve of the indoor unit arranged on the first pipeline. 9. The system according to claim 8, wherein the indoor unit assembly includes a first manifold connected to the outdoor electronic expansion valve assembly, and a second manifold connected to the four-way reversing valve. pipe, the first pipeline is connected to the first header, and the second pipeline is connected to the second header. 10. The system according to claim 5, wherein the outdoor electronic expansion valve assembly comprises an outdoor electronic expansion valve and an outdoor one-way valve arranged in parallel with the outdoor electronic expansion valve, and the outdoor one-way valve Conducted from the fin heat exchanger to the direction of the indoor unit assembly.