Water-free multi-connection system

Abstract

The utility model discloses a water-free multi-connected system which comprises a multi-stage heat exchange module provided with a first refrigerant port and a second refrigerant port, a refrigerant of the water-free multi-connected system can enter from the first refrigerant port, flows out from the second refrigerant port after being subjected to multi-stage heat exchange through the multi-stage heat exchange module, can also enter from the second refrigerant port, and flows out from the third refrigerant port after being subjected to multi-stage heat exchange through the multi-stage heat exchange module. After being subjected to multi-stage heat exchange through the multi-stage heat exchange module, the refrigerant flows out through the first refrigerant through opening; the air disc air supply module is provided with a first refrigerant inlet and a first refrigerant outlet, the first refrigerant inlet communicates with the first refrigerant port through a first electromagnetic valve, and the first refrigerant outlet communicates with the second refrigerant port through a second electromagnetic valve; and the floor heating heat supply module is provided with a second refrigerant inlet and a second refrigerant outlet, the second refrigerant inlet communicates with the first refrigerant port through a third electromagnetic valve, and the second refrigerant outlet communicates with the second refrigerant port through a fourth electromagnetic valve. According to the technical scheme, completely independent operation of the floor heating side and the air disc side can be achieved.

Description

Technical Field

[0001] This application relates to the field of temperature control technology, and in particular to a waterless multi-unit system. Background Technology

[0002] Generally, waterless multi-split systems simultaneously employ both fan coil unit (air distribution module) and underfloor heating unit (heat distribution module) to regulate the ambient temperature, catering to users' needs for multiple temperature control modes. However, existing waterless multi-split systems cannot achieve completely independent operation between the underfloor heating and fan coil units. This results in refrigerant flowing to the non-operating side regardless of which side is running independently, leading to the waste of heat or cold energy being released into the air and impacting the overall heat exchange efficiency of the waterless multi-split system. Utility Model Content

[0003] This application provides a waterless multi-split system, which aims to improve the problem that existing waterless multi-split systems cannot achieve completely independent operation of the underfloor heating side and the fan coil side, resulting in the waste discharge of heat or cold into the air and affecting the heat exchange efficiency of the entire waterless multi-split system.

[0004] Therefore, this application provides a waterless multi-split system, including a fan coil unit, a floor heating module, a multi-stage heat exchange module, a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve, wherein...

[0005] The multi-stage heat exchange module is provided with a first refrigerant inlet and a second refrigerant inlet. The refrigerant of the waterless multi-unit system can either enter through the first refrigerant inlet, undergo multi-stage heat exchange in the multi-stage heat exchange module, and then flow out through the second refrigerant inlet, or it can enter through the second refrigerant inlet, undergo multi-stage heat exchange in the multi-stage heat exchange module, and then flow out through the first refrigerant inlet.

[0006] The fan coil unit is provided with a first refrigerant inlet connected to the first refrigerant port via the first solenoid valve, and a first refrigerant outlet connected to the second refrigerant port via the second solenoid valve.

[0007] The underfloor heating module is provided with a second refrigerant inlet and a second refrigerant outlet. The second refrigerant inlet is connected to the first refrigerant inlet through the third solenoid valve, and the second refrigerant outlet is connected to the second refrigerant inlet through the fourth solenoid valve.

[0008] Optionally, in some embodiments of this application, a one-way valve is also included, wherein the second refrigerant outlet is also connected in one direction to the second refrigerant inlet through the one-way valve, and the one-way valve is arranged in parallel with the fourth solenoid valve.

[0009] Optionally, in some embodiments of the present application, a first three-way joint and a second three-way joint are further included, a first interface of the first three-way joint is in communication with the second refrigerant inlet, a second interface of the first three-way joint is in communication with a first interface of the second three-way joint through the fourth electromagnetic valve, a third interface of the first three-way joint is in communication with a second interface of the second three-way joint through the one-way valve, and a third interface of the second three-way joint is in communication with the second refrigerant outlet, so that the one-way valve and the fourth electromagnetic valve are arranged in parallel.

[0010] Optionally, in some embodiments of the present application, a third three-way joint and a fourth three-way joint are further included.

[0011] A first interface of the third three-way joint is in communication with the first refrigerant outlet, a second interface of the third three-way joint is in communication with the first refrigerant inlet through the first electromagnetic valve, and a third interface of the third three-way joint is in communication with the second refrigerant inlet through the third electromagnetic valve.

[0012] A first interface of the fourth three-way joint is in communication with the second refrigerant outlet, a second interface of the fourth three-way joint is in communication with the first refrigerant outlet through the second electromagnetic valve, and a third interface of the fourth three-way joint is in communication with the second refrigerant outlet through the fourth electromagnetic valve.

[0013] Optionally, in some embodiments of the present application, a stop valve is arranged on each of the first refrigerant inlet, the first refrigerant outlet, the second refrigerant inlet, and the second refrigerant outlet.

[0014] Optionally, in some embodiments of the present application, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, and the fourth electromagnetic valve are all preset structure electromagnetic valves, which need to be powered on for conduction when the refrigerant flows forward, and need to be powered off for conduction when the refrigerant flows reversely.

[0015] The first refrigerant outlet is in communication with an inlet of the first electromagnetic valve, and the first refrigerant inlet is in communication with an outlet of the first electromagnetic valve.

[0016] The second refrigerant outlet is in communication with an inlet of the second electromagnetic valve, and the first refrigerant outlet is in communication with an outlet of the second electromagnetic valve.

[0017] The first refrigerant outlet is in communication with an outlet of the third electromagnetic valve, and the second refrigerant inlet is in communication with an inlet of the third electromagnetic valve.

[0018] The second refrigerant outlet is in communication with an inlet of the fourth electromagnetic valve, and the second refrigerant outlet is in communication with an outlet of the fourth electromagnetic valve.

[0019] Optionally, in some embodiments of the present application, the floor heating heat supply module comprises a floor heating capillary and / or a waterless radiator.

[0020] Optionally, in some embodiments of the present application, the multi-stage heat exchange module comprises a liquid accumulator, an oil-liquid separator, a compressor, a plate heat exchanger and a fin heat exchanger, and the liquid accumulator, the oil-liquid separator, the compressor, the plate heat exchanger and the fin heat exchanger are respectively arranged between the first refrigerant passage and the second refrigerant passage to form a closed-loop refrigerant circulation heat exchange system.

[0021] Optionally, in some embodiments of the present application, the multi-stage heat exchange module further comprises a first filter and a second filter, the first filter is arranged in a branch between the second refrigerant passage and the plate heat exchanger, and the second filter is arranged in a branch between the plate heat exchanger and the fin heat exchanger.

[0022] Optionally, in some embodiments of the present application, the multi-stage heat exchange module further comprises an oil return capillary, and the oil return capillary is arranged in a branch between the liquid accumulator and the oil-liquid separator.

[0023] The waterless multi-contact system provided by the technical scheme of the present application, through the above structure, when the air disc air supply module on the wind disc side needs to be independently operated for heating or cooling, the third electromagnetic valve and the fourth electromagnetic valve can be controlled to be closed to ensure that the refrigerant does not go to the floor heating heat supply module on the floor heating side, causing the heat or cold to be wasted to the air. When the floor heating heat supply module on the floor heating side needs to be independently operated for heating, the first electromagnetic valve and the second electromagnetic valve can also be controlled to be closed to ensure that the refrigerant does not go to the air disc module on the air disc side, causing the heat or cold to be wasted to the air. In this way, the waterless multi-contact system can realize the simultaneous operation of multiple application modes, the complete independent operation of the floor heating side and the air disc side, and the heat exchange efficiency of the entire waterless multi-contact system through the cooperation between the multiple electromagnetic valves. It can be seen that the technical scheme can effectively improve the problem that the existing waterless multi-contact system cannot realize the complete independent operation of the floor heating side and the air disc side, causing the heat or cold to be wasted to the air, and affecting the heat exchange efficiency of the entire waterless multi-contact system. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained from the structures shown in the drawings without creative labor for those skilled in the art.

[0025] Figure 1 A first structure schematic diagram of the waterless multi-contact system of the embodiment of the present application;

[0026] Figure 2 A waterless multi-contact system shown in the air heating + air disc heating mode; Figure 1 A waterless multi-contact system shown in the air disc cooling mode;

[0027] Figure 3 A waterless multi-contact system shown in the air disc heating mode; Figure 1 A waterless multi-contact system shown in the air disc cooling mode;

[0028] Figure 4 A waterless multi-contact system shown in the air disc heating mode; Figure 1 A waterless multi-contact system shown in the air heating mode;

[0029] Figure 5 A waterless multi-contact system shown in the air heating mode; Figure 1 A waterless multi-contact system shown in the air heating mode;

[0030] Figure 6 A second structure schematic diagram of the waterless multi-contact system of the embodiment of the present application;

[0031] Figure 7 A waterless multi-contact system shown in the air heating + air disc heating mode; Figure 6 A waterless multi-contact system shown in the air disc cooling mode;

[0032] Figure 8 A waterless multi-contact system shown in the air disc heating mode; Figure 6 A waterless multi-contact system shown in the air disc cooling mode;

[0033] Figure 9 A waterless multi-contact system shown in the air disc heating mode; Figure 6 A waterless multi-contact system shown in the air heating mode;

[0034] Figure 10 A waterless multi-contact system shown in the air heating mode; Figure 6 A waterless multi-contact system shown in the air heating mode;

[0035] Figure 11 A waterless multi-contact system shown in the air heating mode constant stop locking heat; Figure 6 A waterless multi-contact system shown in the air heating defrosting mode;

[0036] Figure 12 A waterless multi-contact system shown in the air disc defrosting mode; Figure 6 A waterless multi-contact system shown in the air disc defrosting mode.

[0037] Figure 13 A waterless multi-contact system shown in the air disc defrosting mode. Figure 6 A waterless multi-contact system shown in the air disc defrosting mode.

[0038] BRIEF DESCRIPTION OF DRAWINGS

[0039] 100, waterless multi-contact system; 110, air disc air supply module; 111, first refrigerant inlet; 112, first refrigerant outlet; 120, floor heating heat supply module; 121, second refrigerant inlet; 122, second refrigerant outlet; 130, multi-stage heat exchange module; 131, liquid accumulator; 132, oil separator; 133, compressor; 134, plate heat exchanger; 135, fin heat exchanger; 136, first filter; 137, second filter; 138, oil return capillary; 140, first electromagnetic valve; 150, second electromagnetic valve; 160, third electromagnetic valve; 170, fourth electromagnetic valve; 180, check valve; 191, first three-way joint; 192, second three-way joint; 193, third three-way joint; 194, fourth three-way joint.

[0040] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0042] It should be noted that all directional indications, such as up, down, left, right, front, back, etc., in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0043] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed by the present application.

[0044] In one embodiment, as Figures 1 to 5As shown, the embodiment of the present application provides a waterless multi-contact system 100, which specifically can include a wind disc air supply module 110, a floor heating heat supply module 120, a multi-stage heat exchange module 130, a first electromagnetic valve 140, a second electromagnetic valve 150, a third electromagnetic valve 160, and a fourth electromagnetic valve 170. The multi-stage heat exchange module 130 is mainly provided with a first refrigerant passage (not shown) and a second refrigerant passage (not shown). The waterless multi-contact system 100 can enter the refrigerant from the first refrigerant passage, perform multi-stage heat exchange through the multi-stage heat exchange module 130, and then flow out through the second refrigerant passage. The waterless multi-contact system 100 can also enter the refrigerant from the second refrigerant passage, perform multi-stage heat exchange through the multi-stage heat exchange module 130, and then flow out through the first refrigerant passage. The wind disc air supply module 110 is mainly provided with a first refrigerant inlet 111 which is communicated with the first refrigerant passage through the first electromagnetic valve 140, and a first refrigerant outlet 112 which is communicated with the second refrigerant passage through the second electromagnetic valve 150. The floor heating heat supply module 120 is provided with a second refrigerant inlet 121 and a second refrigerant outlet 122. The second refrigerant inlet 121 is communicated with the first refrigerant passage through the third electromagnetic valve 160, and the second refrigerant outlet 122 is communicated with the second refrigerant passage through the fourth electromagnetic valve 170.

[0045] It can be understood that the waterless multi-contact system 100 mentioned in the embodiment of the present application is mainly applied to a temperature adjusting system through wind disc air supply and / or floor heating. The wind disc air supply module 110 mentioned above is mainly a conventional wind disc air supply module 110, which supplies cold air or hot air in the form of wind disc air supply to heat or cool the surrounding air to achieve the purpose of heating or cooling. The floor heating heat supply module 120 mentioned above is mainly a conventional floor heating heat supply module 120, which heats the surrounding air in the form of floor heating to achieve the purpose of heating. The multi-stage heat exchange module 130 mentioned above is mainly a conventional compressor 133 heat exchange structure to realize the refrigerant cooling heat exchange cycle or cooling heat exchange cycle. The first electromagnetic valve 140, the second electromagnetic valve 150, the third electromagnetic valve 160, and the fourth electromagnetic valve 170 mentioned above are all normally closed electromagnetic valves, which can realize the flow of refrigerant only when they are powered on.

[0046] In addition, when the waterless multi-contact system 100 operates in the wind disc cooling mode, the third electromagnetic valve 160 can be provided to avoid the direct communication of the pipeline on the side of the floor heating heat supply module 120 with the low-pressure end, thereby avoiding the phenomenon of condensation water generated when the surface temperature of the heating fins on the side of the floor heating heat supply module 120 is lower than a certain degree due to the low evaporation temperature. When the waterless multi-contact system 100 operates in the floor heating heating mode, the second electromagnetic valve 150 can be provided to avoid the phenomenon that the liquid refrigerant after condensation is stored on the wind disc side, which is equivalent to a one-way liquid storage tank, so the system shows a lack of refrigerant phenomenon.

[0047] In this way, through the above structural arrangement, when the air disc side air disc air supply module 110 needs to be independently operated for heating or cooling, the third electromagnetic valve 160 and the fourth electromagnetic valve 170 can be closed to ensure that the refrigerant does not go to the floor heating side floor heating heat supply module 120, causing heat or cold to be wasted into the air. When the floor heating side floor heating heat supply module 120 needs to be independently operated for heating, the first electromagnetic valve 140 and the second electromagnetic valve 150 can be closed to ensure that the refrigerant does not go to the air disc side air disc module, causing heat or cold to be wasted into the air. In this way, the waterless multi-contact system 100 can realize complete independent operation of the floor heating side and the air disc side while realizing multiple application modes through the cooperation between the multiple electromagnetic valves, ensuring the heat exchange efficiency of the entire waterless multi-contact system 100.

[0048] In some examples, as shown in Figure 1 In this way, through the above structural arrangement, when the air disc side air disc air supply module 110 needs to be independently operated for heating or cooling, the third electromagnetic valve 160 and the fourth electromagnetic valve 170 can be closed to ensure that the refrigerant does not go to the floor heating side floor heating heat supply module 120, causing heat or cold to be wasted into the air. When the floor heating side floor heating heat supply module 120 needs to be independently operated for heating, the first electromagnetic valve 140 and the second electromagnetic valve 150 can be closed to ensure that the refrigerant does not go to the air disc side air disc module, causing heat or cold to be wasted into the air. In this way, the waterless multi-contact system 100 can realize complete independent operation of the floor heating side and the air disc side while realizing multiple application modes through the cooperation between the multiple electromagnetic valves, ensuring the heat exchange efficiency of the entire waterless multi-contact system 100.

[0049] It can be understood that when the waterless multi-contact system 100 in the present example operates in the floor heating defrosting mode, if there is no fourth electromagnetic valve 170, defrosting will be performed through heat exchange on the air disc side, at which time the air disc side air supply module fan will suddenly open, causing a sudden noise. With the fourth electromagnetic valve 170, the fourth electromagnetic valve 170 and the third electromagnetic valve 160 can be opened at the same time, and the first electromagnetic valve 140 and the second electromagnetic valve 150 can be closed at the same time to utilize the floor heating for defrosting without causing a sudden noise.

[0050] The refrigerant flow in various application modes of the waterless multi-contact system 100 in the present example will be described in detail below:

[0051] I. When the water-free multi-contact system 100 operates in the floor heating + air-coil heating mode, the first electromagnetic valve 140, the second electromagnetic valve 150, and the third electromagnetic valve 160 are kept in the open state, and the fourth electromagnetic valve 170 is kept in the closed state. At this time, the refrigerant flow is shown by arrows. Figure 2

[0052] II. When the water-free multi-contact system 100 operates in the air-coil cooling mode, the first electromagnetic valve 140 and the second electromagnetic valve 150 are kept in the open state, and the third electromagnetic valve 160 and the fourth electromagnetic valve 170 are kept in the closed state. At this time, the refrigerant flow is shown by arrows. Figure 3

[0053] III. When the water-free multi-contact system 100 operates in the air-coil heating mode, the first electromagnetic valve 140 and the second electromagnetic valve 150 are kept in the open state, and the third electromagnetic valve 160 and the fourth electromagnetic valve 170 are kept in the closed state. At this time, the refrigerant flow is shown by arrows. Figure 4

[0054] IV. When the water-free multi-contact system 100 operates in the floor heating mode, the third electromagnetic valve 160 is kept in the open state, and the first electromagnetic valve 140, the second electromagnetic valve 150, and the fourth electromagnetic valve 170 are kept in the closed state. At this time, the refrigerant flow is shown by arrows. Figure 5

[0055] In some examples, as shown in Figure 1 The third three-way joint 193 has a first interface in communication with the first refrigerant passage, a second interface in communication with the first refrigerant inlet 111 through the first electromagnetic valve 140, and a third interface in communication with the second refrigerant inlet 121 through the third electromagnetic valve 160. The fourth three-way joint 194 has a first interface in communication with the second refrigerant passage, a second interface in communication with the first refrigerant outlet 112 through the second electromagnetic valve 150, and a third interface in communication with the second refrigerant outlet 122 through the fourth electromagnetic valve 170. In this way, the first refrigerant inlet 111 and the second refrigerant inlet 121 are in communication with the first refrigerant passage, and the first refrigerant outlet 112 and the second refrigerant outlet 122 are in communication with the second refrigerant passage.

[0056] In some examples, as shown in Figure 1 ​​​​As shown, a stop valve (not shown in the figure) is arranged on each of the first refrigerant inlet 111, the first refrigerant outlet 112, the second refrigerant inlet 121 and the second refrigerant outlet 122. In this way, the opening and closing control of the corresponding inlet or outlet can be realized through the above structural arrangement.

[0057] In some examples, as Figure 6 As shown, the first electromagnetic valve 140, the second electromagnetic valve 150, the third electromagnetic valve 160 and the fourth electromagnetic valve 170 are all preset structure electromagnetic valves, which need to be powered on for conduction when the refrigerant flows forward, and need to be powered off for conduction when the refrigerant flows reversely. The first refrigerant passage is connected to the inlet of the first electromagnetic valve 140, and the first refrigerant inlet 111 is connected to the outlet of the first electromagnetic valve 140. The second refrigerant passage is connected to the inlet of the second electromagnetic valve 150, and the first refrigerant outlet 112 is connected to the outlet of the second electromagnetic valve 150. The first refrigerant passage is connected to the outlet of the third electromagnetic valve 160, and the second refrigerant inlet is connected to the inlet of the third electromagnetic valve 160. The second refrigerant passage is connected to the inlet of the fourth electromagnetic valve 170, and the second refrigerant outlet is connected to the outlet of the fourth electromagnetic valve 170. In this way, through the cooperation between the multiple electromagnetic valves in different forms, the waterless multi-contact system 100 in this example can realize the simultaneous application of multiple application modes, the complete independent operation of the floor heating side and the air disc side, and the heat exchange efficiency of the entire waterless multi-contact system 100.

[0058] The refrigerant flow in various application modes of the waterless multi-contact system 100 in this example will be described in detail below:

[0059] I. When the waterless multi-contact system 100 operates in the floor heating + air disc heating mode, the first electromagnetic valve 140 is kept in the powered-on state, and the second electromagnetic valve 150, the third electromagnetic valve 160 and the fourth electromagnetic valve 170 are all kept in the powered-off state. At this time, the refrigerant flow is shown in detail by the arrows. Figure 7

[0060] II. When the waterless multi-contact system 100 operates in the air disc cooling mode, the second electromagnetic valve 150 is kept in the powered-on state, and the first electromagnetic valve 140, the third electromagnetic valve 160 and the fourth electromagnetic valve 170 are all kept in the powered-off state. At this time, the refrigerant flow is shown in detail by the arrows. Figure 8

[0061] III. When the waterless multi-contact system 100 operates in the air disc heating mode, the first electromagnetic valve 140 and the third electromagnetic valve 160 are both kept in the powered-on state, and the second electromagnetic valve 150 and the fourth electromagnetic valve 170 are both kept in the powered-off state. At this time, the refrigerant flow is shown in detail by the arrows. Figure 9

[0062] ​​​IV. When this waterless multi-split system 100 is operating in underfloor heating mode, its first solenoid valve 140, second solenoid valve 150, third solenoid valve 160, and fourth solenoid valve 170 are all de-energized. For details regarding the refrigerant flow at this time, please refer to [link / reference needed]. Figure 10 As indicated by the arrow;

[0063] V. When this waterless multi-split system 100 is operating in the underfloor heating mode with constant stop to lock in heat, its first solenoid valve 140, third solenoid valve 160, and second solenoid valve 150 remain de-energized, while the fourth solenoid valve 170 remains energized. For details on the refrigerant flow at this time, please refer to [link to relevant documentation]. Figure 11 As indicated by the arrow, when the waterless multi-split system 100 is in the underfloor heating mode and is in a constant stop state, it is kept in a non-conductive state by energizing the fourth solenoid valve 170, thereby temporarily locking the refrigerant in the underfloor heating module 120 to lock in the heat of the refrigerant and maintain its underfloor heating effect.

[0064] VI. When this waterless multi-split system 100 is operating in underfloor heating defrosting mode, its first solenoid valve 140 and second solenoid valve 150 remain de-energized, while the third solenoid valve 160 and fourth solenoid valve 170 remain energized. For details regarding the refrigerant flow at this time, please refer to [link to relevant documentation]. Figure 12 As indicated by the arrow;

[0065] 7. When this waterless multi-split system 100 is operating in fan coil defrost mode, its second solenoid valve 150 remains energized, while the first solenoid valve 140, the third solenoid valve 160, and the fourth solenoid valve 170 remain de-energized. For details on the refrigerant flow at this time, please refer to [link to relevant documentation]. Figure 13 As indicated by the arrow.

[0066] In some examples, such as Figure 1 As shown, the underfloor heating module 120 includes underfloor heating capillary tubes and / or waterless radiators. Thus, through the above structural arrangement, the uniform heat delivery function of the underfloor heating module 120 can be ensured.

[0067] In some examples, such as Figure 1 As shown, the multi-stage heat exchange module 130 includes a liquid receiver 131, an oil separator 132, a compressor 133, a plate heat exchanger 134, and a finned heat exchanger 135. The liquid receiver 131, oil separator 132, compressor 133, plate heat exchanger 134, and finned heat exchanger 135 are respectively disposed between the first refrigerant inlet and the second refrigerant inlet to form a closed-loop refrigerant circulation heat exchange system. Thus, through the above structural arrangement, the cooling heat exchange circulation or cooling heat exchange cycle of the refrigerant within the multi-stage heat exchange module 130 can be ensured.

[0068] In some examples, such as Figure 1As shown, the multi-stage heat exchange module 130 further comprises a first filter 136 and a second filter 137, the first filter 136 is arranged in the branch between the second refrigerant port and the plate heat exchanger 134, and the second filter 137 is arranged in the branch between the plate heat exchanger 134 and the fin heat exchanger 135. In this way, through the above structural arrangement, the purity of the refrigerant entering the plate heat exchanger 134 and the fin heat exchanger 135 can be ensured, so as to prolong the service life of the plate heat exchanger 134 and the fin heat exchanger 135.

[0069] In some examples, as Figure 1 As shown, the multi-stage heat exchange module 130 further comprises an oil return capillary tube 138 arranged in the branch between the liquid reservoir 131 and the oil separator 132. In this way, through the above structural arrangement, since the pipe diameter of the oil return capillary tube 138 is small, it has a certain resistance to the flow of lubricating oil. Through this resistance, the flow rate of the oil return can be adjusted to match the operating requirements of the compressor 133, so as to prevent the problems of too fast or too slow oil return. This is because, if the oil return speed is too fast, it may cause the compressor 133 to suck liquid, affecting the performance of the refrigeration or system, and if the oil return speed is too slow, it cannot supplement the lubricating oil for the compressor 133 in time, increasing the risk of wear of the compressor 133.

[0070] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields based on the utility model concept of the present application, and the contents of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A waterless multi-connection system, characterized in that, This includes a fan coil unit, a floor heating unit, a multi-stage heat exchange unit, a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve. The multi-stage heat exchange module is provided with a first refrigerant inlet and a second refrigerant inlet. The refrigerant of the waterless multi-unit system can either enter through the first refrigerant inlet, undergo multi-stage heat exchange in the multi-stage heat exchange module, and then flow out through the second refrigerant inlet, or it can enter through the second refrigerant inlet, undergo multi-stage heat exchange in the multi-stage heat exchange module, and then flow out through the first refrigerant inlet. The fan coil unit is provided with a first refrigerant inlet and a first refrigerant outlet. The first refrigerant inlet is connected to the first refrigerant port through the first solenoid valve, and the first refrigerant outlet is connected to the second refrigerant port through the second solenoid valve. The underfloor heating module is provided with a second refrigerant inlet and a second refrigerant outlet. The second refrigerant inlet is connected to the first refrigerant inlet through the third solenoid valve, and the second refrigerant outlet is connected to the second refrigerant inlet through the fourth solenoid valve.

2. The waterless multi-unit system as described in claim 1, characterized in that, It also includes a one-way valve, and the second refrigerant outlet is also connected to the second refrigerant inlet in one direction through the one-way valve, and the one-way valve is arranged in parallel with the fourth solenoid valve.

3. The waterless multi-unit system as described in claim 2, characterized in that, It also includes a first tee connector and a second tee connector. The first port of the first tee connector is connected to the second refrigerant outlet. The second port of the first tee connector is connected to the first port of the second tee connector through the fourth solenoid valve. The third port of the first tee connector is connected to the second port of the second tee connector through the one-way valve. The third port of the second tee connector is connected to the second refrigerant inlet, so that the one-way valve and the fourth solenoid valve are arranged in parallel.

4. The waterless multi-unit system as described in claim 1, characterized in that, It also includes the third tee connector and the fourth tee connector; The first port of the third tee connector is connected to the first refrigerant inlet, the second port of the third tee connector is connected to the first refrigerant inlet through the first solenoid valve, and the third port of the third tee connector is connected to the second refrigerant inlet through the third solenoid valve. The first port of the fourth three-way connector is connected to the second refrigerant inlet, the second port of the fourth three-way connector is connected to the first refrigerant outlet through the second solenoid valve, and the third port of the fourth three-way connector is connected to the second refrigerant outlet through the fourth solenoid valve.

5. The waterless multi-unit system as described in claim 1, characterized in that, A shut-off valve is installed on the first refrigerant inlet, the first refrigerant outlet, the second refrigerant inlet, and the second refrigerant outlet.

6. The waterless multi-unit system as described in claim 1, characterized in that, The first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are all solenoid valves with a preset structure. When the refrigerant flows in the forward direction, the solenoid valve with the preset structure needs to be powered on to conduct, and when the refrigerant flows in the reverse direction, it needs to be powered off to conduct. The first refrigerant inlet is connected to the inlet of the first solenoid valve, and the first refrigerant inlet is connected to the outlet of the first solenoid valve. The second refrigerant inlet is connected to the inlet of the second solenoid valve, and the first refrigerant outlet is connected to the outlet of the second solenoid valve; The first refrigerant inlet is connected to the outlet of the third solenoid valve, and the second refrigerant inlet is connected to the inlet of the third solenoid valve; The second refrigerant inlet is connected to the inlet of the fourth solenoid valve, and the second refrigerant outlet is connected to the outlet of the fourth solenoid valve.

7. The waterless multi-unit system as described in claim 1, characterized in that, The underfloor heating heat delivery module includes underfloor heating capillary tubes and / or waterless radiators.

8. The waterless multi-unit system according to any one of claims 1-7, characterized in that, The multi-stage heat exchange module includes a liquid receiver, an oil separator, a compressor, a plate heat exchanger, and a finned heat exchanger. The liquid receiver, the oil separator, the compressor, the plate heat exchanger, and the finned heat exchanger are respectively disposed between the first refrigerant inlet and the second refrigerant inlet to form a closed-loop refrigerant circulation heat exchange system.

9. The waterless multi-unit system as described in claim 8, characterized in that, The multi-stage heat exchange module further includes a first filter and a second filter. The first filter is disposed in the branch between the second refrigerant inlet and the plate heat exchanger, and the second filter is disposed in the branch between the plate heat exchanger and the finned heat exchanger.

10. The waterless multi-unit system as described in claim 8, characterized in that, The multi-stage heat exchange module also includes an oil return capillary tube, which is disposed in a branch between the liquid reservoir and the oil separator.

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