Counter-current and counter-current heat exchange coil pipe device and air conditioning unit

Abstract

The utility model provides a concurrent-countercurrent heat exchange coil device and an air conditioning unit. The concurrent-countercurrent heat exchange coil device comprises a heat exchange coil assembly, a first pipeline, a second pipeline, a water inlet pipeline, a water outlet pipeline and a control valve group, a water inlet of the heat exchange coil assembly communicates with the first pipeline, a water outlet of the heat exchange coil assembly communicates with the second pipeline, and the water inlet pipeline is connected with the first pipeline and the second pipeline through the control valve set. And the water outlet pipeline is respectively connected with the first pipeline and the second pipeline through the control valve group. According to the concurrent and countercurrent heat exchange coil device, a user can switch the flow direction of the heat exchange medium according to actual application scenes so as to meet different application scenes; according to the air conditioning unit, through the design of the heating device, in the cold region, air entering the air duct can be preheated, then the air passes through the heat exchange coil assembly, and the possibility of pipe explosion of the heat exchange coil assembly can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of air treatment, in particular to a forward and reverse flow heat exchange coil device and an air conditioning unit. Background Art

[0002] The air conditioning unit cools or heats the air by supplying heat exchange medium to the heat exchanger through the cold source or heat source. The heat exchanger heats or cools the air passing through the air conditioning unit, thereby reducing or increasing the indoor temperature. There are two types of heat exchangers: counter-current heat exchangers and co-current heat exchangers.

[0003] Among them, a co-current heat exchanger refers to a heat exchange method in which the direction of heat transfer is the same as the flow direction of the fluid in the heat exchanger. In a co-current heat exchanger, the temperature difference between the hot flow and the cold flow remains unchanged as the heat exchange proceeds, and the heat exchange efficiency is relatively low. Co-current heat exchangers are suitable for occasions where temperature changes are not strictly required, such as hot water supply and heating systems. The advantage of a co-current heat exchanger is that the flow direction of the fluid is consistent with the direction of heat transfer, and interference is not easy to occur, thereby ensuring the effect of heat exchange.

[0004] A countercurrent heat exchanger is a heat exchange method in which the direction of heat transfer is opposite to the flow direction of the fluid in the heat exchanger. In a countercurrent heat exchanger, the temperature difference between the hot flow and the cold flow continues to decrease, and the heat exchange effect gradually decreases, but a higher efficiency can be achieved. Countercurrent heat exchangers are suitable for occasions with high requirements for temperature changes, such as refrigeration and chemical reactions. The advantages of countercurrent heat exchangers are high heat exchange efficiency and high energy utilization, so they are more commonly used in occasions with high energy requirements. However, since the direction of heat transfer is opposite to the direction of fluid flow, in actual use, it is necessary to consider the problem of mutual interference of fluids. For example, during the heat exchange process between two different media, penetration may occur, thereby affecting the effect of heat exchange.

[0005] Therefore, countercurrent heat exchangers and cocurrent heat exchangers each have their own advantages and disadvantages in terms of heat exchange efficiency and usage scenarios. However, since the flow pattern of the current heat exchanger is fixed when leaving the factory, the air-conditioning unit cannot be replaced according to the actual application scenario, resulting in a small scope of application. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings and deficiencies in the prior art and to provide a co-current and counter-current heat exchange coil device and an air conditioning unit.

[0007] One embodiment of the utility model provides a co-current and counter-current heat exchange coil device, comprising: a heat exchange coil assembly, a first pipeline, a second pipeline, a water inlet pipeline, a water outlet pipeline and a control valve group;

[0008] The water inlet of the heat exchange coil assembly is communicated with the first pipeline, the water outlet of the heat exchange coil assembly is communicated with the second pipeline, the water inlet pipeline is connected to the first pipeline and the second pipeline respectively through the control valve group, and the water outlet pipeline is connected to the first pipeline and the second pipeline respectively through the control valve group;

[0009] When the co-current and counter-current heat exchange coil device is in the co-current mode, the control valve group opens the connection between the water inlet pipe and the first pipe and the connection between the water outlet pipe and the second pipe, and the control valve group closes the connection between the water inlet pipe and the second pipe and the connection between the water outlet pipe and the first pipe;

[0010] When the co-current and countercurrent heat exchange coil device is in the countercurrent mode, the control valve group closes the connection between the water inlet pipe and the first pipe and the connection between the water outlet pipe and the second pipe, and the control valve group opens the connection between the water inlet pipe and the second pipe and the connection between the water outlet pipe and the first pipe.

[0011] In some optional embodiments, the control valve group includes a first control valve, a second control valve, a third control valve and a fourth control valve, the water inlet pipe is connected to the first pipe through the first control valve, the water inlet pipe is connected to the second pipe through the second control valve, the water outlet pipe is connected to the first pipe through the third control valve, and the water outlet pipe is connected to the second pipe through the fourth control valve.

[0012] In some optional embodiments, a plurality of heat exchange tubes are provided in the heat exchange coil assembly, the water inlet and the water outlet are respectively arranged at both ends of the heat exchange tubes, the first pipe is connected to the water inlets of the plurality of heat exchange tubes, and the second pipe is connected to the water outlets of the plurality of heat exchange tubes.

[0013] Another embodiment of the utility model provides an air conditioning unit, comprising: a unit casing, a fan and a co-current and counter-current heat exchange coil device as described above, an air duct is formed in the unit casing, and the fan and the co-current and counter-current heat exchange coil device are arranged in the air duct.

[0014] In some optional embodiments, a heating device is provided in the air duct, and the heating device and the co-current and counter-current heat exchange coil device are arranged in sequence along the air flow direction of the air duct.

[0015] In some optional embodiments, the heating device includes a bracket and a plurality of PTC heating elements, the bracket is arranged in the air duct, and the plurality of PTC heating elements are arranged on the bracket.

[0016] In some optional embodiments, the control valve group of the co-current and counter-current heat exchange coil device is arranged in the air duct, and the water inlet pipe and the water outlet pipe pass through the unit casing and extend to the outside of the unit casing.

[0017] In some optional embodiments, an inspection door and an inspection port connected to the air duct are provided on one side of the unit casing, and the inspection door is movably connected to the unit casing for opening and closing the inspection port.

[0018] In some optional embodiments, a locking mechanism is provided on the unit casing, and the locking mechanism locks the inspection door to the inspection opening.

[0019] In some optional embodiments, the locking mechanism includes a plurality of locking blocks and a plurality of threaded locking members, wherein the plurality of locking blocks are arranged around the inspection door and press the inspection door into the inspection port, and the locking blocks are detachably mounted on the unit casing via the threaded locking members.

[0020] Compared with the prior art, in the co-current and countercurrent heat exchange coil device of the present invention, the user can switch the flow direction of the heat exchange medium according to the actual application scenario, so as to meet different application scenarios; and the air-conditioning unit of the present invention, through the design of the heating device, can pre-heat the air entering the air duct in cold areas, and then let the air pass through the heat exchange coil assembly, so as to prevent the possibility of the heat exchange coil assembly bursting.

[0021] In order to more clearly understand the present invention, the specific implementation of the present invention will be described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of one side of a co-current and counter-current heat exchange coil device according to an embodiment of the utility model;

[0023] Figure 2 This is a structural schematic diagram of the other side of the forward and reverse flow heat exchange coil device of one embodiment of the utility model;

[0024] Figure 3 This is a simplified structural schematic diagram of a co-current and counter-current heat exchange coil device in a co-current mode according to an embodiment of the utility model;

[0025] Figure 4 This is a simplified structural schematic diagram of a forward and countercurrent heat exchange coil device in a countercurrent mode according to an embodiment of the utility model;

[0026] Figure 5 A cross-sectional view of an air conditioning unit according to an embodiment of the utility model;

[0027] Figure 6This is a schematic diagram of the structure of an air conditioning unit according to an embodiment of the utility model when part of the structure is hidden;

[0028] Figure 7 An exploded view of an air conditioning unit according to an embodiment of the utility model;

[0029] Figure 8 for Figure 6 An enlarged view of A is shown.

[0030] Description of reference numerals:

[0031] 10. Heat exchange coil assembly; 11. Water inlet; 12. Water outlet; 20. First pipeline; 30. Second pipeline; 40. Water inlet pipeline; 50. Water outlet pipeline; 60. Control valve group; 61. First control valve; 62. Second control valve; 63. Third control valve; 64. Fourth control valve; 70. Unit casing; 71. Inspection door; 72. Inspection port; 73. Locking mechanism; 74. Locking block; 75. Threaded locking member; 80. Fan; 90. Heating device; 91. Bracket; 92. PTC heating element. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. In the description of the utility model, unless otherwise specified, "multiple" means 2 or more, and "several" means 1 or more. In addition, unless otherwise specified, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the description of the utility model, the description with reference to the terms "one embodiment", "some optional implementations" or "some optional embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0036] See also Figure 1 and Figure 2 An embodiment of the utility model provides a co-current and counter-current heat exchange coil device, comprising: a heat exchange coil assembly 10, a first pipe 20, a second pipe 30, a water inlet pipe 40, a water outlet pipe 50 and a control valve group 60.

[0037] The water inlet 11 of the heat exchange coil assembly 10 is connected to the first pipe 20, the water outlet 12 of the heat exchange coil assembly 10 is connected to the second pipe 30, the water inlet pipe 40 is connected to the first pipe 20 and the second pipe 30 respectively through the control valve group 60, and the water outlet pipe 50 is connected to the first pipe 20 and the second pipe 30 respectively through the control valve group 60.

[0038] See also Figure 3 When the co-current and counter-current heat exchange coil device is in the co-current mode, the control valve group 60 opens the connection between the water inlet pipe 40 and the first pipe 20 and the connection between the water outlet pipe 50 and the second pipe 30, and the control valve group 60 closes the connection between the water inlet pipe 40 and the second pipe 30 and the connection between the water outlet pipe 50 and the first pipe 20. In the co-current mode, the flow direction of the heat exchange medium in the heat exchange coil assembly 10 is consistent with the direction of heat transfer, and interference is not likely to occur, thereby ensuring the effect of heat exchange.

[0039] See also Figure 4When the forward and reverse flow heat exchange coil device is in the reverse flow mode, the control valve group 60 closes the connection between the water inlet pipe 40 and the first pipe 20 and the connection between the water outlet pipe 50 and the second pipe 30, and the control valve group 60 opens the connection between the water inlet pipe 40 and the second pipe 30 and the connection between the water outlet pipe 50 and the first pipe 20. In the reverse flow mode, the flow direction of the heat exchange medium in the heat exchange coil assembly 10 is opposite to the direction of heat transfer, and the heat exchange efficiency is high, which is suitable for occasions with high requirements for temperature changes.

[0040] The user can operate the control valve group 60 according to the actual application scenario to switch the co-current mode and the counter-current mode, thereby switching the flow direction of the heat exchange medium in the heat exchange coil assembly 10, so that the co-current and counter-current heat exchange coil device assembly can meet different application scenarios.

[0041] The specific structure of the control valve group 60 can be designed according to actual needs. For example, in some optional embodiments, the control valve group 60 includes a first control valve 61, a second control valve 62, a third control valve 63 and a fourth control valve 64. The water inlet pipe 40 is connected to the first pipe 20 through the first control valve 61, the water inlet pipe 40 is connected to the second pipe 30 through the second control valve 62, the water outlet pipe 50 is connected to the first pipe 20 through the third control valve 63, and the water outlet pipe 50 is connected to the second pipe 30 through the fourth control valve 64. The control valve group 60 can independently control the connection between the water inlet pipe 40 and the first pipe 20 and the second pipe 30 and the connection between the water outlet pipe 50 and the first pipe 20 and the second pipe 30, so that the user can operate the control valve group 60 conveniently.

[0042] When the co-current and counter-current heat exchange coil device is in the co-current mode, the first control valve 61 opens the connection between the water inlet pipe 40 and the first pipe 20, the second control valve 62 closes the connection between the water inlet pipe 40 and the second pipe 30, the third control valve 63 closes the connection between the water outlet pipe 50 and the first pipe 20, and the fourth control valve 64 opens the connection between the water outlet pipe 50 and the second pipe 30.

[0043] When the co-current and countercurrent heat exchange coil device is in the countercurrent mode, the first control valve 61 closes the connection between the water inlet pipe 40 and the first pipe 20, the second control valve 62 opens the connection between the water inlet pipe 40 and the second pipe 30, the third control valve 63 opens the connection between the water outlet pipe 50 and the first pipe 20, and the fourth control valve 64 closes the connection between the water outlet pipe 50 and the second pipe 30.

[0044] The structure of the heat exchange coil assembly 10 can be designed according to actual needs. For example, in some optional embodiments, a plurality of heat exchange tubes are arranged in the heat exchange coil assembly 10, and the water inlet 11 and the water outlet 12 are respectively arranged at both ends of the heat exchange tubes. The first pipe 20 is connected to the water inlet 11 of the plurality of heat exchange tubes, and the heat exchange medium in the first pipe 20 is divided into the plurality of heat exchange tubes. The second pipe 30 is connected to the water outlet 12 of the plurality of heat exchange tubes, and the heat exchange medium in the plurality of heat exchange tubes merges into the second pipe 30.

[0045] See also Figure 5 The above-mentioned co-current and counter-current heat exchange coil device can be applied to an air-conditioning unit, which includes: a unit casing 70, a fan 80 and a co-current and counter-current heat exchange coil device as described above. An air duct is formed in the unit casing 70, and the fan 80 and the co-current and counter-current heat exchange coil device are arranged in the air duct. The fan 80 drives air into the air duct, and the air is heated or cooled by the heat exchange coil assembly 10 of the co-current and counter-current heat exchange coil device, and then blown out from the air duct to achieve indoor heating or cooling.

[0046] In cold areas, the temperature of the air just entering the air duct is low, and the air converges with the heat exchange medium with a lower temperature flowing out of the heat exchange coil assembly 10, which can easily cause the heat exchange medium to be cooled to ice, and the ice expands after condensation, which can easily cause the heat exchange coil assembly 10, the first pipe 20, the second pipe 30 or the water outlet pipe 50 to burst. In some optional embodiments, a heating device 90 is provided in the air duct, and the heating device 90 and the co-current and countercurrent heat exchange coil device are arranged in sequence along the air flow direction of the air duct. The heating device 90 can pre-heat the low-temperature air entering the air duct, thereby increasing the temperature of the air, and then let the air pass through the heat exchange coil assembly 10, thereby preventing the heat exchange medium in the co-current and countercurrent heat exchange coil device from condensing into ice and bursting due to the air temperature being too low.

[0047] See also Figure 6 The specific structure of the heating device 90 can be designed according to actual needs. For example, in some optional embodiments, the heating device 90 includes a bracket 91 and a plurality of PTC heating elements 92. The bracket 91 is arranged in the air duct, and the plurality of PTC heating elements 92 are arranged on the bracket 91. Of course, the heating device 90 can also adopt other heating types, and is not limited to this example.

[0048] In some optional embodiments, the control valve group 60 of the co-current and counter-current heat exchange coil device is arranged in the air duct, and the water inlet pipe 40 and the water outlet pipe 50 pass through the unit casing 70 and extend to the outside of the unit casing 70, so that the control valve group 60 is hidden in the unit casing 70, thereby improving the overall aesthetics of the unit.

[0049] See also Figure 7In some optional embodiments, an inspection door 71 and an inspection port 72 connected to the air duct are provided on one side of the unit casing 70. The inspection door 71 is movably connected to the unit casing 70 and is used to open and close the inspection port 72. The inspection port 72 facilitates the user to enter the air duct to operate the control valve group 60, and also facilitates the inspection of other components in the air duct, such as the heat exchange coil assembly 10, the fan 80, etc.

[0050] In some optional embodiments, a locking mechanism 73 is provided on the unit casing 70 , and the locking mechanism 73 locks the inspection door 71 to the inspection opening 72 , thereby facilitating the disassembly and assembly of the inspection door 71 .

[0051] See also Figure 6 and Figure 8 The specific structure of the locking mechanism 73 can be designed according to actual needs. For example, in some optional embodiments, the locking mechanism 73 includes a plurality of locking blocks 74 and a plurality of threaded locking members 75. The plurality of locking blocks 74 are arranged around the inspection door 71 and press the inspection door 71 into the inspection port 72, thereby restricting the inspection door 71 in the inspection port 72. The locking blocks 74 are detachably mounted on the unit casing 70 through the threaded locking members 75. The threaded locking members 75 are twisted to release the restriction on the locking blocks 74, thereby disengaging the locking blocks 74 from the inspection door 71, and then the inspection door 71 can be removed from the inspection port 72.

[0052] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A forward and countercurrent heat exchange coil device, characterized in that: include: A heat exchange coil assembly, a first pipeline, a second pipeline, a water inlet pipeline, a water outlet pipeline and a control valve group; The water inlet of the heat exchange coil assembly is communicated with the first pipeline, the water outlet of the heat exchange coil assembly is communicated with the second pipeline, the water inlet pipeline is connected to the first pipeline and the second pipeline respectively through the control valve group, and the water outlet pipeline is connected to the first pipeline and the second pipeline respectively through the control valve group; When the co-current and counter-current heat exchange coil device is in the co-current mode, the control valve group opens the connection between the water inlet pipe and the first pipe and the connection between the water outlet pipe and the second pipe, and the control valve group closes the connection between the water inlet pipe and the second pipe and the connection between the water outlet pipe and the first pipe; When the co-current and countercurrent heat exchange coil device is in the countercurrent mode, the control valve group closes the connection between the water inlet pipe and the first pipe and the connection between the water outlet pipe and the second pipe, and the control valve group opens the connection between the water inlet pipe and the second pipe and the connection between the water outlet pipe and the first pipe.

2. A co-current and counter-current heat exchange coil device according to claim 1, characterized in that: The control valve group includes a first control valve, a second control valve, a third control valve and a fourth control valve. The water inlet pipeline is connected to the first pipeline through the first control valve, the water inlet pipeline is connected to the second pipeline through the second control valve, the water outlet pipeline is connected to the first pipeline through the third control valve, and the water outlet pipeline is connected to the second pipeline through the fourth control valve.

3. The co-current and counter-current heat exchange coil device according to claim 1, characterized in that: A plurality of heat exchange tubes are arranged in the heat exchange coil assembly, the water inlet and the water outlet are respectively arranged at both ends of the heat exchange tube, the first pipe is connected to the water inlets of the plurality of heat exchange tubes, and the second pipe is connected to the water outlets of the plurality of heat exchange tubes.

4. An air conditioning unit, characterized in that: include: A unit casing, a fan, and a co-current and counter-current heat exchange coil device as described in any one of claims 1 to 3, wherein an air duct is formed in the unit casing, and the fan and the co-current and counter-current heat exchange coil device are arranged in the air duct.

5. An air conditioning unit according to claim 4, characterized in that: A heating device is provided in the air duct, and the heating device and the co-current and counter-current heat exchange coil device are arranged in sequence along the air flow direction of the air duct.

6. An air conditioning unit according to claim 5, characterized in that: The heating device comprises a bracket and a plurality of PTC heating elements. The bracket is arranged in the air duct, and the plurality of PTC heating elements are arranged in an array on the bracket.

7. An air conditioning unit according to claim 4, characterized in that: The control valve group of the co-current and counter-current heat exchange coil device is arranged in the air duct, and the water inlet pipe and the water outlet pipe pass through the unit casing and extend out of the unit casing.

8. An air conditioning unit according to claim 4, characterized in that: An inspection door and an inspection port connected to the air duct are arranged on one side of the unit casing, and the inspection door is movably connected to the unit casing and is used to open and close the inspection port.

9. An air conditioning unit according to claim 8, characterized in that: The unit casing is provided with a locking mechanism, and the locking mechanism locks the inspection door to the inspection opening.

10. An air conditioning unit according to claim 9, characterized in that: The locking mechanism includes a plurality of locking blocks and a plurality of threaded locking members. The plurality of locking blocks are arranged around the inspection door and press the inspection door into the inspection port. The locking blocks are detachably mounted on the unit casing via the threaded locking members.

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