WO2020015296A1 - Multi-split cold and hot water unit - Google Patents

Abstract

The present invention relates to the field of refrigeration devices, and provides a multi-split cold and hot water unit. The multi-split cold and hot water unit comprises: an outdoor heat exchanger unit (1), an indoor heat exchanger unit (2), a heating heat exchanger unit (3), and a regulating valve (4); the regulating valve (4) comprises ports which are respectively communicated with refrigerant inlet/outlet pipelines of the outdoor heat exchanger unit (1), the indoor heat exchanger unit (2), and the heating heat exchanger unit (3), and a regulating member for switching the communication relationship of refrigerant flow paths between the plurality of ports. The multi-split cold and hot water unit can realize flexible matching of various water path conveying modes such as refrigeration, heating, and floor heating, thereby greatly simplifying the water path mounting complexity of the multi-split cold and hot water unit; the multi-split cold and hot water unit has the advantages of reducing mounting costs, improving pipeline mounting convenience, greatly reducing water path running resistance, and improving user experience.

Description

Multi-line cold and hot water unit

This application claims priority from a Chinese patent application filed with the Chinese Patent Office on July 20, 2018, with application number 201810806047.5, and the invention name is "a multi-line hot and cold water heating unit", the entire contents of which are incorporated herein by reference. in.

Technical field

The invention relates to the field of refrigeration equipment, in particular to a multi-line cold and hot water unit.

Background technique

At present, the central air conditioners on the market are mainly divided into two series: chiller and multi-connection. Among them, the air-conditioning system of the chiller is composed of an outdoor host and an indoor terminal device. The outdoor host provides air-conditioning cold / hot water, which is transported by the water pipe system to the indoor end device. Water and air are exchanged at the indoor end to eliminate the cold / Heat load is a type of air-conditioning system that generates heat and heat in a concentrated manner, but disperses the load of each room. The multi-line air conditioning system uses refrigerant as the transmission medium and uses variable refrigerant flow technology. The outdoor host is composed of outdoor heat exchangers, compressors and other refrigeration accessories, and the indoor unit is composed of direct evaporation heat exchangers and fans. One outdoor unit can send refrigerant liquid to several indoor units through pipes. By controlling the refrigerant circulation volume of the compressor and the refrigerant flow rate into the indoor heat exchangers, it can timely meet the indoor cold and heat load requirements.

The two types of central air-conditioning systems have their own advantages and disadvantages. Therefore, the existing central air-conditioning system has also developed a multi-line cold and hot water unit that combines refrigerant units and multiple connections to take into account the advantages of both models. Multi-line hot and cold water unit, that is, the chilled water or hot water is first taken by the outdoor mechanism, and then piped to the indoor unit at the end for the user to adjust the air conditioning of the air. Compared with the multi-line fluorine system, the multi-line hot and cold water unit has a large number of outdoor unit connections and needs to add heating modules such as floor heating that are enabled under heating conditions. Therefore, the overall waterway design is extremely complicated, requiring the design of multiple crossed pipelines. To achieve the waterway connection of the outdoor unit, indoor unit and heating module, the workload in the engineering installation is very large, which undoubtedly increases the installation cost.

Summary of the invention

Therefore, the technical problem to be solved by the present invention is to provide a multi-connected cold and hot water unit to solve the problem of complicated water circuit design of the existing multi-connected cold and hot water unit.

In order to solve the above problems, according to a first aspect of the present invention, a multi-line cold and hot water unit is provided. The multi-line cold and hot water unit includes: an external heat exchange unit, an internal heat exchange unit, a heating heat exchange unit, and Regulating valve, the regulating valve includes ports for connecting refrigerant inlet and outlet pipes of an external heat exchanger unit, an internal heat exchanger unit, and a heating heat exchanger unit, respectively, and a switch for switching the refrigerant flow path connection relationship between multiple ports. Adjusting pieces.

In an optional embodiment, the regulating valve has a valve chamber with a circular cross section, and each port is in communication with the valve chamber;

The multiple ports include a port, b port, c port, d port, e port, f port, and g port which are sequentially arranged along the circumferential direction of the valve cavity. Among them, the a port and the refrigerant inlet pipeline of the internal heat exchanger unit Are connected, port b is connected to the refrigerant outlet pipe of the external heat exchange unit, port c is connected to the refrigerant inlet pipe of the heating heat exchange unit, and port d is connected to the refrigerant outlet pipe of the heating heat exchange unit, e The port is connected to the refrigerant inlet pipe of the external heat exchanger unit, the f port is connected to the refrigerant outlet pipe of the internal heat exchanger unit, and the g port is connected to the e port through an external pipe;

The adjusting part includes a moving valve block arranged in the valve cavity. The moving valve block includes three partition plates arranged at an angle between two. One end of the three partition plates is fixed on the rotating shaft of the center of the valve cavity, and the other end Abutting against the inner wall of the valve cavity, so that the two adjacent partitions and the inner wall of the valve cavity form a sub-chamber capable of communicating the refrigerant flow paths of the adjacent two or three ports and isolating the other ports. room;

The three partitions of the moving valve block can be rotated around the rotation axis.

In an optional implementation manner, the three partition plates include a first partition plate, a second partition plate, and a third partition plate which are sequentially arranged along the arrangement direction of the multiple ports, wherein the first partition plate, the second partition plate, A first sub-chamber covering three ports is formed between the partition plate and the inner wall of the valve cavity, and a second sub-chamber covering two ports is formed between the second partition plate, the third partition plate and the inner wall of the valve cavity, A third sub-chamber covering the two ports is formed between the third partition, the first partition and the inner wall of the valve cavity;

The motion valve block has:

Place the a, b and g ports in the first sub-chamber, c and d ports in the second sub-chamber, and e-port and f-port in the refrigeration valve position of the third sub-chamber;

A port, b port and c port are in the first sub-chamber, d port and e port are in the second sub chamber, f port and g port are in the heating valve position of the third sub chamber;

A port, g port, and f port are in the first sub-chamber, b port and c port are in the second sub chamber, and d port and e port are in the heating valve position of the third sub chamber;

The moving valve block can be controlled to switch between the cooling valve position, the heating valve position and the heating valve position.

In an optional embodiment, an external pipeline connected to the g port and the e port is provided with an on-off solenoid valve.

In an optional embodiment, the refrigerant inlet pipe of the heating heat exchange unit is provided with a first control valve for controlling the refrigerant flow rate, and the refrigerant outlet pipe of the heating heat exchange unit is provided with a second control for controlling the refrigerant flow rate. valve.

In an optional implementation manner, the multi-line hot and cold water heating unit further includes a controller, and the controller is configured to:

Receiving control instructions for indicating the operating mode of the multi-line hot and cold water unit, the operating modes include a cooling mode, a heating mode, a heating mode, and a dual heating and heating mode;

Control and adjust the operating status of multiple components of the multi-line hot and cold water unit, so that the multi-line hot and cold water unit operates in the operation mode corresponding to the control instruction; multiple components include a regulating valve, a first control valve, a second control valve, and a communication valve. Disconnect the solenoid valve.

In an optional implementation manner, the controller is specifically configured to:

When receiving a control instruction indicating that the operation mode of the multi-line hot and cold water unit is a cooling mode, the control motion valve block is rotated to switch to a cooling valve position, the on-off solenoid valve is closed, and the second control valve is opened.

In an optional implementation manner, the controller is specifically configured to:

When receiving a control instruction indicating that the operation mode of the multi-line hot and cold water heating unit is the heating mode, the motion valve block is controlled to switch to the heating valve position, the on-off solenoid valve and the second control valve are opened, and the first Control valve.

In an optional implementation manner, the controller is specifically configured to:

When receiving a control instruction indicating that the operation mode of the multi-line hot and cold water heating unit is the heating mode, the control motion valve block is rotated to switch to the heating valve position, the on-off solenoid valve is closed, and the first control valve is opened.

In an optional implementation manner, the controller is specifically configured to:

When receiving a control instruction indicating that the operation mode of the multi-line hot and cold water unit is heating and heating dual mode, the control motion valve block is rotated to switch to the heating valve position, and the on-off solenoid valve, the first control valve and the first Two control valves.

The multi-line cold and hot water unit provided by the present invention is different from the original water circuit design that uses multiple pipes to connect the external heat exchanger unit, the internal heat exchanger unit and the heating heat exchanger unit, respectively. The refrigerant inlet and outlet pipes of the internal heat exchange unit and the heating heat exchange unit are connected to the regulating valve in a unified manner, and the regulating member of the regulating valve can switch the refrigerant flow path communication relationship between multiple ports, which can realize cooling and heating. The flexible combination of various water transport modes such as floor heating, greatly simplifies the complexity of water installation of multi-line hot and cold water units, reduces the installation cost, improves the convenience of pipeline installation, greatly reduces the resistance of waterway operation, and enhances user comfort. And other advantages, improving the user experience.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a multi-connection hot and cold water unit in a cooling mode according to an embodiment of the present invention;

2 is a schematic structural diagram of a multi-line hot and cold water heating unit in a heating mode according to an embodiment of the present invention;

3 is a schematic structural diagram of a multi-connected hot and cold water unit in a heating mode according to an embodiment of the present invention;

4 is a schematic structural diagram of a multi-line hot and cold water generating unit in a heating mode according to an embodiment of the present invention;

Among them, 1. External heat exchange unit; 2. Internal heat exchange unit; 3. Heating heat exchange unit; 4. Control valve; 51; First partition; 52; Second partition; 53; Third partition 61, first sub-chamber; 62, second sub-chamber; 63, third sub-chamber; 7, external piping; 8, on-off solenoid valve; 91, first control valve; 92, second control valve.

detailed description

The invention provides a multi-connected hot and cold water unit, which includes an external heat exchanger unit 1, an internal heat exchanger unit 2, and a heating heat exchange unit 3. Among them, the external heat exchanger unit can be set in an outdoor environment, including one or more outdoor heat exchangers, and each outdoor heat exchanger can be used to exchange heat with the outdoor environment to provide multiple hot and cold water connections. In different modes of the unit, low-temperature refrigerant or high-temperature refrigerant is produced. The internal unit heat exchange unit 2 includes one or more indoor heat exchangers, such as one or more air-conditioned indoor units. The indoor heat exchanger can be used for the indoor environment. Heat exchange, in different modes of multi-connected cold and hot water units, use the prepared low-temperature refrigerant to absorb heat to cool down, or use the produced high-temperature refrigerant to release heat to raise the temperature, so as to change the temperature of the indoor environment; the heating and heat exchange unit 3 Including, but not limited to, floor heating, radiators, etc., the following description mainly uses floor heating as an example.

In the embodiment, the multiple indoor heat exchangers of the internal heat exchanger unit 2 are respectively arranged in independent indoor units. The refrigerant pipes of the multiple indoor units are connected in parallel, and the refrigerant inlet and outlet pipes of the internal heat exchanger unit 2 are connected in parallel. Connected to parallel pipes of multiple indoor units.

The multi-line hot and cold water unit also includes a regulating valve 4 including ports for refrigerant inlet and outlet pipelines which are connected to the external heat exchanger unit 1, the internal heat exchanger unit 2 and the heating heat exchanger unit 3, respectively. A regulator for communicating the refrigerant flow path between the ports. The regulator can switch the refrigerant inlet and outlet pipelines of the external heat exchanger unit 1, the internal heat exchanger unit 2 and the heating heat exchanger unit 3 according to the working mode set by the multi-line cold and hot water unit to achieve the refrigerant. Conveying is required in the current working mode.

The multi-line cold and hot water unit provided by the present invention is different from the original water circuit design that uses multiple pipes to connect the external heat exchanger unit 1, the internal heat exchanger unit 2 and the heating heat exchanger unit 3 respectively. The refrigerant inlet and outlet pipes of the heat unit 1, the internal heat exchanger unit 2 and the heating heat exchanger unit 3 are connected to the regulating valve 4 in a unified manner, and the refrigerant flow path communication between multiple ports can be switched by using the regulating member of the regulating valve 4 The relationship can realize the flexible combination of various water delivery modes such as refrigeration, heating, and floor heating, which greatly simplifies the complexity of water installation of multi-line hot and cold water units, reduces installation costs, improves the convenience of pipeline installation, and greatly reduces The advantages of waterway running resistance and enhanced user comfort improve the user experience.

In this embodiment, the refrigerant in the multi-line hot and cold water unit is water.

Specifically, the regulating valve 4 is a round cake structure, and a valve cavity with a circular cross-section is formed inside. The above-mentioned ports for connecting the external heat exchanger unit 1, the internal heat exchanger unit 2 and the heating heat exchanger unit 3 are connected to The valve chambers are in communication; the multiple ports include a port, b port, c port, d port, e port, f port, and g port, which are sequentially arranged along the circumferential direction of the valve chamber (counterclockwise in the illustration). The ports can be arranged at equal intervals or unequal intervals;

The port a is connected to the refrigerant inlet pipe of the internal heat exchanger unit 2, the port b is connected to the refrigerant outlet pipe of the external heat exchanger unit 1, and the port c is connected to the refrigerant inlet pipe of the heating heat exchanger unit 3. The d port is connected to the refrigerant outlet pipe of the heating and heat exchange unit 3, the e port is connected to the refrigerant inlet pipe of the external heat exchanger unit 1, and the f port is connected to the refrigerant outlet pipe of the internal heat exchanger unit 2, The g port is connected to the e port through an external pipe 7; here, the e port is connected to the external pipe 7 and the refrigerant inlet pipe of the external heat exchanger unit 1 through a three-way pipe port.

The adjusting member includes a moving valve block disposed in the valve cavity, and the moving valve block includes three partition plates arranged at an angle between two.

As can be seen from the drawings, each partition is arranged along the radial direction of the valve cavity. One end of the three partitions is fixed to the rotation axis of the circle center of the valve cavity, and the other end abuts against the inner wall of the valve cavity so that A sub-chamber is formed between two adjacent partitions and the inner wall of the valve cavity to allow the refrigerant flow paths of the adjacent two or three ports to communicate with each other and isolate them from other ports;

The three partitions of the moving valve block can be rotated around the rotation axis, and the included angle of the three partitions does not change during the rotation. The rotation direction of the three partitions includes clockwise rotation or counterclockwise rotation.

In order to facilitate the distinction, the three partitions include a first partition 51, a second partition 52, and a third partition 53 which are sequentially arranged along the arrangement direction of the ports (counterclockwise in the illustration). A partition 51, a second partition 52, and an inner wall of the valve cavity form a first sub-chamber 61 covering three ports, and the three ports can communicate with each other in the first sub-chamber 61 so that the refrigerant can Flow occurs between the three ports; a second sub-chamber 62 covering the two ports is formed between the second partition 52, the third partition 53 and the inner wall of the valve cavity, and the two ports can be in the second sub-chamber 62, so that the refrigerant can flow between the two ports; a third sub-chamber 63 covering the two ports is formed between the third partition plate 53, the first partition plate 51, and the inner wall of the valve cavity. The two ports can communicate with each other in the third sub-chamber 63 so that the refrigerant can flow between the two ports.

FIG. 1 is a schematic structural diagram of a multi-connection hot and cold water unit in a cooling mode according to an embodiment of the present invention, which shows a valve position of a moving valve block in the cooling mode and a refrigerant flow direction of the multi-connection hot and cold water unit; FIG. 2 is a schematic structural diagram of a multi-connection hot and cold water unit in heating mode according to an embodiment of the present invention, which shows the valve position of the moving valve block in the cooling mode and the refrigerant flow of the multi-connection hot and cold water unit 3 is a schematic structural diagram of a multi-connection hot and cold water unit in heating mode according to an embodiment of the present invention, which shows the valve position of the moving valve block in the cooling mode and the refrigerant flow of the multi-connection hot and cold water unit Figure 4 is a schematic structural diagram of a multi-connected hot and cold water generating unit in a heating mode according to an embodiment of the present invention, which shows the valve position of the moving valve block in the cooling mode and the Refrigerant flows.

The motion valve block has:

The a, b and g ports are in the first sub-chamber 61, the c and d ports are in the second sub-chamber 62, and the e and f ports are in the refrigeration valve position of the third sub-chamber 63, as shown in Fig. 1 Shown

A port, b port and c port are in the first sub-chamber 61, d port and e port are in the second sub chamber 62, f port and g port are in the heating valve position of the third sub chamber 63, as shown in the figure 2 and Figure 4;

A port, g port and f port are in the first sub-chamber 61, b port and c port are in the second sub chamber 62, and d port and e port are in the heating valve position of the third sub chamber 63, as shown in FIG. 3 As shown.

The moving valve block can be controlled to switch between the cooling valve position, the heating valve position and the heating valve position. Here, the regulating valve 4 further includes a driving motor for driving the moving valve block for rotation switching, and one end of the rotating shaft protrudes from the valve cavity and is drivingly connected with the driving motor.

In this embodiment, the rotation direction of the moving valve block with the rotating shaft includes counterclockwise steering and clockwise steering. Therefore, the driving motor is a dual steering motor. By controlling the steering of the dual steering motor, the rotation direction of the moving valve block can be achieved. control.

The valve cavity is provided with a shaft hole for the extension of the rotating shaft. A seal ring for preventing refrigerant leakage is provided on the inner peripheral side of the shaft hole. The seal ring is an elastic annular ring structure. An annular groove is formed in the shaft hole, which can be used to accommodate the seal. The rotating shaft extends out of the valve cavity through the shaft hole, and the sealing ring is sleeved on the outer periphery of the rotating shaft.

Optionally, the valve body and multiple partitions are made of a low thermal conductivity material, so less heat is exchanged between the valve body and the external environment through the valve body, and the heat exchange between different sub-chambers can also be reduced to avoid different sub-chambers. Interaction between different temperature refrigerants in the chamber;

As an alternative or supplement, the inner wall of the valve body and the side of the partition plate that is in contact with the refrigerant are provided with a heat insulation sheet layer, which is one or more layers, and can also be used to reduce heat transfer. For example, the thermal insulation sheet layer is a foam layer.

In the figure, the external pipe 7 connected to the g port and the e port is provided with an on-off solenoid valve 8. The on-off solenoid valve 8 can be used to control the on or off of the external pipe 7.

The refrigerant inlet pipe of the heating and heat exchange unit 3 is provided with a first control valve 91 for controlling the refrigerant flow rate. The first control valve 91 can be used to control the conduction or blocking of the refrigerant inlet pipe, thereby controlling whether the refrigerant can flow into the heating exchange. Heat unit 3.

The refrigerant outlet pipe of the heating and heat exchange unit 3 is provided with a second control valve 92 for controlling the refrigerant flow rate. The second control valve 92 can be used to control the conduction or blocking of the refrigerant outlet pipe, thereby controlling whether the refrigerant can flow out of the heating exchange. Heat unit 3.

The multi-line hot and cold water unit also includes a controller (not shown in the figure). The controller is used to receive a control instruction for indicating the operating mode of the multi-line hot and cold water unit. The operating mode includes a cooling mode, a heating mode, and a heating mode. Mode and heating and heating dual modes; control and adjust the operating status of multiple components of the multi-line hot and cold water unit, so that the multi-line hot and cold water unit operates in the operating mode corresponding to the control command; multiple components include the regulating valve 4, the first The control valve 91, the second control valve 92, and the on-off solenoid valve 8.

Specifically, when the controller receives a control instruction indicating that the operation mode of the multi-line hot and cold water unit is the cooling mode, the controller controls the movement valve block to switch to the cooling valve position, closes the on-off solenoid valve 8 and opens the first二 控制 阀 92。 Two control valves 92.

As shown in Figure 1, at this time, the refrigerant flow path of the multi-line cold and hot water unit in the cooling mode is one. The refrigerant flow direction of the refrigerant flow path is: external heat exchanger unit 1 → refrigerant outlet pipe (external machine replacement) Heat unit 1) → b port → first sub-chamber 61 → a port → refrigerant inlet pipe (internal heat exchanger unit 2) → indoor unit → refrigerant outlet pipe (internal heat exchanger unit 2) → f port → The third sub-chamber 63 → e port → refrigerant inlet pipe (external heat exchanger unit 1) → external heat exchanger unit 1; at this time, the external heat exchanger unit 1 is made of low temperature refrigerant and passes through the refrigerant The flow direction is conveyed to the internal heat exchanger unit 2. This is the refrigerant circulation flow path in the cooling mode.

Here, the multi-line hot and cold water unit also includes a first internal machine temperature sensor and a second internal machine temperature sensor, wherein the first internal machine temperature sensor is provided in the refrigerant inlet pipeline of the internal machine heat exchange unit 2 for detecting the flow. The internal machine liquid inlet temperature of the refrigerant inlet pipe through the internal machine heat exchange unit 2; the second internal machine temperature sensor is provided in the refrigerant outlet pipe of the internal machine heat exchange unit 2 and is used to detect the heat exchange flowing through the internal machine Internal machine outlet temperature of the refrigerant outlet pipe of unit 2;

The multi-line cold and hot water unit also includes a first flow sensor for detecting the real-time refrigerant flow rate flowing through the internal-machine heat exchange unit 2. Here, the first flow sensor may be provided in a refrigerant inlet pipe or a refrigerant outlet pipe of the internal heat exchanger unit 2.

The controller is further configured to calculate a cooling target refrigerant flow rate of the internal-mechanical heat exchange unit 2 according to the internal-machine liquid inlet temperature and the internal-machine outlet temperature.

For example, the inlet temperature of the internal machine is T11, the outlet temperature of the internal machine is T12, and the capacity of the external heat exchanger unit 1 is set to Q, the rated flow rate is H = Q * 0.143; the temperature difference between the inlet and the outlet of the internal machine is calculated ΔT1 = T12- T11;

The cooling target refrigerant flow h1 can be calculated according to the following formula:

In this way, based on the real-time refrigerant flow rate detected by the first flow sensor, the relevant flow adjustment components of the external heat exchanger unit 1 and the flow opening degree of the second control valve 92 are controlled and adjusted to flow through the internal heat exchanger unit 2 The refrigerant flow rate is controlled at the cooling target refrigerant flow rate h1 to match the current operating conditions.

When the controller receives a control instruction indicating that the operation mode of the multi-line hot and cold water heating unit is the heating mode, the controller controls the movement valve block to switch to the heating valve position, opens the on-off solenoid valve 8 and the second control The valve 92 closes the first control valve 91.

As shown in Figure 2, at this time, the refrigerant flow path of the multi-line cold and hot water unit in heating mode is one, and the refrigerant flow direction of the refrigerant flow path is: external heat exchanger unit 1 → refrigerant outlet pipe (external unit Heat exchange unit 1) → b port → first sub-chamber 61 → a port → refrigerant inlet pipeline (internal heat exchanger unit 2) → indoor unit → refrigerant outlet pipeline (internal heat exchanger unit 2) → f port → The third sub-chamber 63 → g port → external pipe 7 → refrigerant inlet pipe (external heat exchanger unit 1) → external heat exchanger unit 1; The refrigerant is conveyed to the internal heat exchanger unit 2 through the refrigerant flow direction. This is the refrigerant circulation flow path in the heating mode.

Here, the controller is further configured to calculate a heating target refrigerant flow rate of the internal-machine heat exchange unit 2 according to the internal-machine liquid-inlet temperature and internal-machine liquid-out temperature.

For example, the inlet temperature of the internal machine is T21, the outlet temperature of the internal machine is T22, the capacity of the external heat exchanger unit 1 is set to Q, the rated flow rate H = Q * 0.143; T21;

The heating target refrigerant flow rate h2 can be calculated according to the following formula:

In this way, based on the real-time refrigerant flow rate detected by the first flow sensor, the relevant flow adjustment components of the external heat exchanger unit 1 and the flow opening degree of the second control valve 92 are controlled and adjusted to flow through the internal heat exchanger unit 2 The refrigerant flow rate is controlled at the heating target refrigerant flow rate h2 to match the current operating conditions.

When the controller receives a control instruction that indicates that the operation mode of the multi-line hot and cold water unit is heating mode, the controller controls the movement valve block to switch to the heating valve position, closes the on-off solenoid valve 8 and opens the first control valve 91.

As shown in Figure 3, at this time, the refrigerant flow path of the multi-line cold and hot water unit in the heating mode is one, and the refrigerant flow direction of the refrigerant flow path is: external heat exchanger unit 1 → refrigerant outlet pipe (external machine replacement) Heat unit 1) → b port → first sub-chamber 61 → c port → refrigerant inlet pipe (heating heat exchange unit 33) → floor heating → refrigerant outlet pipe (heating heat exchange unit 33) → d port → third sub Chamber 63 → e port → Refrigerant inlet pipe (external heat exchanger unit 1) → external heat exchanger unit 1; at this time, the external heat exchanger unit 1 is made of high temperature refrigerant and is conveyed to the refrigerant through the above refrigerant flow direction. Heating heating unit 33. This is the refrigerant circulation flow path in heating mode.

Here, the multi-line hot and cold water unit also includes a first heating temperature sensor and a second heating temperature sensor, wherein the first heating temperature sensor is provided in the refrigerant inlet pipe of the internal heat exchanger unit 2 and is used to detect the heating through The heating inlet temperature of the refrigerant inlet pipe of the heating unit 33; the second heating temperature sensor is arranged on the refrigerant outlet pipe of the heating heat exchange unit 33, and is used to detect the heating outlet of the refrigerant outlet pipe flowing through the heating heat exchange unit 33. Liquid temperature

The multi-line hot and cold water unit also includes a second flow sensor for detecting the real-time refrigerant flow rate through the heating and heat exchange unit 33. Here, the second flow sensor may be provided in a refrigerant inlet pipe or a refrigerant outlet pipe of the heating and heat exchange unit 33.

The controller is further configured to calculate a heating target refrigerant flow rate of the heating heat exchange unit 33 according to the heating inlet liquid temperature and the heating outlet liquid temperature.

For example, the temperature of the heating inlet liquid is T31, the temperature of the heating outlet liquid is T32, the capacity of the external heat exchanger unit 1 is set to Q, the rated flow rate H = Q * 0.143; the temperature difference between the heating inlet and outlet liquid ΔT3 = T32-T31 is calculated;

The heating target refrigerant flow h3 can be calculated according to the following formula:

In this way, by controlling and adjusting the relevant flow adjustment components of the external heat exchanger unit 1 and the flow opening degree of the first control valve 91, based on the real-time refrigerant flow detected by the second flow sensor, the The refrigerant flow rate is controlled at the heating target refrigerant flow rate h3 to match the current working conditions.

When the controller receives a control instruction indicating that the operation mode of the multi-line hot and cold water unit is the heating and heating dual mode, the controller controls the movement valve block to switch to the heating valve position, and opens the on-off solenoid valve. A control valve 91 and a second control valve 92.

As shown in Figure 4, at this time, there are two refrigerant flow paths in the heating and heating mode of the multi-connected cold and hot water unit, and the refrigerant flow direction of one of the refrigerant flow paths is: external heat exchanger unit 1 → refrigerant outlet pipe (External heat exchanger unit 1) → b port → first sub-chamber 61 → a port → refrigerant inlet pipe (internal heat exchanger unit 2) → indoor unit → refrigerant outlet pipe (internal heat exchanger unit 2) → f port → third subchamber 63 → g port → external pipe 7 → refrigerant inlet pipe (external heat exchanger unit 1) → external heat exchanger unit 1; the refrigerant flow direction of the other refrigerant flow path is: outside Heat exchanger unit 1 → refrigerant outlet pipe (external heat exchanger unit 1) → b port → first subchamber 61 → c port → refrigerant inlet pipe (heating heat exchanger unit 33) → floor heating → refrigerant outlet pipe (Heating heat exchange unit 33) → d port → second sub-chamber 62 → e port → refrigerant inlet pipeline (external heat exchange unit 1) → external heat exchange unit 1.

At this time, the external heat exchanger unit 1 is prepared as a high-temperature refrigerant, and is sent to the heating heat exchanger unit 33 and the internal heat exchanger unit 2 respectively through the refrigerant flow direction. This is the refrigerant circulation flow path in the heating mode.

Here, the controller is also used to calculate the target refrigerant flow rate of the internal heat exchanger unit 2 according to the internal liquid inlet temperature and the internal liquid outlet temperature; and according to the heating inlet liquid temperature and the heating outlet liquid temperature, The heating target refrigerant flow rate of the heating heat exchange unit 33.

For example, the inlet temperature of the internal unit is T41, the outlet temperature of the internal unit is T42, the heating inlet temperature is T43, and the heating outlet temperature is T44. The capacity of the external unit heat exchanger unit 1 is set to Q, and the rated flow rate H = Q * 0.143; Calculate the temperature difference ΔT41 = T42-T41 of the inlet and outlet liquid of the internal machine, and the temperature difference ΔT42 = T44-T43 of the inlet and outlet liquid of the heating;

Then the heating target refrigerant flow h41 can be calculated according to the following formula:

The heating target refrigerant flow h41 is calculated according to the following formula:

In this way, based on the real-time refrigerant flow detected by the first and second flow sensors, by controlling and adjusting the relevant flow adjustment components of the external heat exchanger unit 1 and the flow opening degrees of the first control valve 91 and the second control valve 92, The refrigerant flow rate passing through the internal heat exchanger unit 2 is controlled to the heating target refrigerant flow rate h41, and the refrigerant flow rate passing through the heating heat exchange unit 33 is controlled to the heating target refrigerant flow rate h42, so as to adapt to the current working conditions.

Those skilled in the art can easily understand that the above-mentioned advantageous manners can be freely combined and superimposed on the premise of no conflict.

The above description is only the preferred embodiments of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection of the present invention. Within range. The above is only a preferred embodiment of the present invention. It should be noted that, for those of ordinary skill in the art, without departing from the technical principles of the present invention, several improvements and variations can be made. These improvements and variations It should also be regarded as the protection scope of the present invention.

Claims (10)

1. A multi-line hot and cold water unit is characterized in that the multi-line hot and cold water unit includes:

   External heat exchange unit;

   Internal heat exchanger unit;

   Heating heat exchange unit;

   A regulating valve, the regulating valve comprising ports for connecting refrigerant inlet and outlet pipelines of the external heat exchanger unit, the internal heat exchanger unit and the heating heat exchanger unit, respectively, and a switch for switching a plurality of the A regulator for communicating the refrigerant flow path between the ports.
2. The multi-line hot and cold water heating unit according to claim 1, wherein the regulating valve has a valve cavity with a circular cross section, and each of the ports is in communication with the valve cavity;

   The multiple ports include an a port, a b port, a c port, a d port, an e port, an f port, and a g port that are sequentially arranged along a circumferential direction of the valve cavity, wherein the a port and the internal machine exchange heat. The refrigerant inlet pipeline of the unit is connected, the b port is connected to the refrigerant outlet pipeline of the external heat exchanger unit, and the c port is connected to the refrigerant inlet pipeline of the heating heat exchange unit. The d port is connected to the refrigerant outlet pipe of the heating heat exchange unit, the e port is connected to the refrigerant inlet pipe of the external heat exchange unit, and the f port is connected to the internal heat exchange unit. The refrigerant outlet pipe is connected, and the g port is connected to the e port through an external pipe;

   The adjusting member includes a moving valve block provided in the valve cavity, the moving valve block includes three partition plates arranged at an angle between two, and one end of the three partition plates is fixed to the valve block. On the rotating shaft of the circle center of the valve cavity, the other end abuts against the inner wall of the valve cavity, so that the two adjacent partitions and the inner wall of the valve cavity form a refrigerant capable of adjoining two or three ports. Sub-chambers with flow paths communicating and isolated from other ports;

   The three partitions of the moving valve block can rotate around the rotation axis.
3. The multi-line hot and cold water heating unit according to claim 2, wherein the three partitions include a first partition, a second partition and a third partition which are sequentially arranged along the arrangement direction of the plurality of ports, wherein A first sub-chamber covering three ports is formed between the first partition, the second partition and the inner wall of the valve cavity, and the second partition, the third partition and A second sub-chamber covering two ports is formed between the inner walls of the valve cavity, and a third sub-chamber covering the two ports is formed between the third partition, the first partition, and the inner wall of the valve cavity. Sub-chamber

   The moving valve block has:

   A port, b port and g port are in the first sub-chamber, c port and d port are in the second sub-chamber, e-port and f port are in the refrigeration valve of the third sub-chamber Bit

   Placing a port, b port, and c port in the first subchamber, d port and e port in the second subchamber, f port and g port in the heating valve position of the third subchamber;

   Placing a port, g port, and f port in the first sub-chamber, b port and c port in the second sub chamber, and d port and e port at the heating valve position of the third sub chamber;

   The moving valve block is controllably switchable between the refrigeration valve position, the heating valve position and the heating valve position.
4. The multi-line hot and cold water heating unit according to claim 2 or 3, wherein the external pipeline connected to the g port and the e port is provided with an on-off solenoid valve.
5. The multi-line cold and hot water unit according to claim 4, characterized in that the refrigerant inlet pipe of the heating and heat exchange unit is provided with a first control valve for controlling the refrigerant flow rate, and the refrigerant outlet of the heating and heat exchange unit is The pipeline is provided with a second control valve for controlling the refrigerant flow rate.
6. The multi-line hot and cold water heating unit according to claim 5, further comprising a controller, wherein the controller is configured to:

   Receiving control instructions for indicating the operating mode of the multi-line hot and cold water unit, the operating modes include a cooling mode, a heating mode, a heating mode, and a dual heating and heating mode;

   Control and adjust the operating states of multiple components of the multi-line hot and cold water unit, so that the multi-line hot and cold water unit operates in an operation mode corresponding to a control instruction; the multiple components include the regulating valve, the first control valve, The second control valve and the on-off solenoid valve.
7. The multi-line hot and cold water unit according to claim 6, wherein the controller is specifically configured to:

   When receiving a control instruction indicating that the operation mode of the multi-line hot and cold water unit is the cooling mode, controlling the moving valve block to rotate to switch to the cooling valve position, and closing the on-off solenoid valve, The second control valve is opened.
8. The multi-line hot and cold water unit according to claim 6, wherein the controller is specifically configured to:

   When receiving a control instruction indicating that the operation mode of the multi-line hot and cold water heating unit is the heating mode, controlling the movement valve block to switch to the heating valve position, and turning on and off the electromagnetic And the second control valve, closing the first control valve.
9. The multi-line hot and cold water unit according to claim 6, wherein the controller is specifically configured to:

   When receiving a control instruction indicating that the operation mode of the multi-line hot and cold water unit is the heating mode, controlling the movement valve block to switch to the heating valve position, and closing the on-off solenoid valve, The first control valve is opened.
10. The multi-line hot and cold water unit according to claim 6, wherein the controller is specifically configured to:

    When receiving a control instruction indicating that the operation mode of the multi-line hot and cold water heating unit is the heating and heating dual mode, control the movement valve block to rotate to switch to the heating valve position, and open the communication valve. Shut off the solenoid valve, the first control valve and the second control valve.

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