Heat exchanger and air conditioning system

Abstract

This invention discloses a heat exchange device and an air conditioning system. The heat exchange device includes: a water tank, comprising a shell, an inner liner, and a heating module; a first heat exchanger having a refrigerant circuit and a heating water circuit; the refrigerant circuit being formed by a refrigerant gas pipe interface, the first heat exchanger, and a refrigerant liquid pipe interface connected sequentially through refrigerant piping; the heating water circuit being formed by a water inlet, a first water pump, the first heat exchanger, a three-way valve, and a water outlet connected sequentially through heating piping; the third port of the three-way valve being connected to a heat exchange piping; a second heat exchanger being installed on the heat exchange piping; and the outlet of the heat exchange piping being connected to the heating piping and located between the water inlet and the first water pump; and a circulating water circuit being formed by a circulating water outlet located on the inner liner, a second water pump, a second heat exchanger, and a circulating water inlet located on the inner liner connected sequentially through circulating piping. The heat exchange device integrates heating hot water and domestic hot water, simplifying installation and reducing costs.

Description

Technical Field

[0001] This invention relates to the field of air conditioning system technology, and particularly to heat exchange devices and air conditioning systems using the same. Background Technology

[0002] In existing technologies, some household air conditioning systems include a heating and hot water system and a domestic hot water system. The heating and hot water system is used for heating in winter, and the domestic hot water system is used for supplying hot water in winter. The heating and hot water system includes a hydraulic module and an outdoor unit, while the domestic hot water system includes an inner tank and an outdoor unit. The hydraulic module is wall-mounted, and the inner tank is floor-mounted, which takes up a lot of space and has high installation costs. The cost for users to purchase two sets of system equipment is also relatively high. Summary of the Invention

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a heat exchange device that integrates the heating hot water system and the domestic hot water system into one unit, reducing space occupation, sharing a single outdoor unit, and lowering equipment purchase costs.

[0004] The present invention also proposes an air conditioning system that includes the above-mentioned heat exchange device.

[0005] A heat exchange device according to a first aspect of the present invention includes: a water tank, comprising a tank shell and an inner liner, wherein a mounting base is disposed on the tank shell; a heating module, mounted on the mounting base, the heating module being provided with a refrigerant liquid pipe interface, a refrigerant gas pipe interface, a first heat exchanger, a first water pump, an inlet, and an outlet, the first heat exchanger having a refrigerant circuit and a heating water circuit, the refrigerant circuit being formed by sequentially connecting the refrigerant gas pipe interface, the first heat exchanger, and the refrigerant liquid pipe interface through refrigerant pipelines, and the heating water circuit being formed by the inlet, the first... The water pump, the first heat exchanger, the three-way valve, and the outlet are connected in sequence through a heating pipe. The third port of the three-way valve is connected to a heat exchange pipe. A second heat exchanger is installed on the heat exchange pipe. The outlet of the heat exchange pipe is connected to the heating pipe and is located between the inlet and the first water pump. The inner tank has a circulating water circuit, which is formed by the circulating water outlet, the second water pump, the second heat exchanger, and the circulating water inlet on the inner tank being connected in sequence through a circulating pipe.

[0006] According to the first aspect of the present invention, the heat exchange device has at least the following beneficial effects: In heating mode, heating return water enters the first heat exchanger from the inlet, and at the same time, high-temperature and high-pressure refrigerant gas enters the first heat exchanger from the refrigerant gas pipe interface. The heating return water and the refrigerant gas exchange heat in the first heat exchanger, and the heating return water is heated. The three-way valve connects to the outlet, and the high-temperature heating return water is delivered to the underfloor heating pipe. In hot water mode, heating return water enters the first heat exchanger, and at the same time, high-temperature and high-pressure refrigerant gas enters the first heat exchanger from the refrigerant gas pipe interface. The heating return water and the refrigerant gas exchange heat in the first heat exchanger, and the heating return water is heated. The three-way valve switches to connect to the heat exchange pipe, and the high-temperature heating return water is input into the second heat exchanger. The second water pump delivers the circulating water in the inner tank into the second heat exchanger. The high-temperature heating return water and the circulating water exchange heat in the second heat exchanger, increasing the temperature of the circulating water. Then, the heated circulating water returns to the inner tank from the circulating water inlet, thus realizing the production of domestic hot water. The heating and hot water systems are integrated into one unit, with the water tank installed on the ground, reducing space occupation and lowering installation and equipment purchase costs.

[0007] According to some embodiments of the first aspect of the present invention, the mounting base is arranged above the inner liner, and the heating module is arranged above the mounting base.

[0008] According to some embodiments of the first aspect of the present invention, the mounting base is provided with a water receiving portion.

[0009] According to some embodiments of the first aspect of the present invention, the inner liner has an inner liner inlet and an inner liner outlet. The inner liner inlet is arranged at the lower part of the shell and is connected to a cold water pipe that extends to the lower part of the inner cavity of the inner liner. The inner liner outlet is arranged at the upper part of the shell and is connected to a hot water pipe that extends to the upper part of the inner cavity of the inner liner.

[0010] According to some embodiments of the first aspect of the present invention, a flow switch is provided on the heating pipeline, and the flow switch is located between the outlet of the heat exchange pipeline and the first water pump.

[0011] According to some embodiments of the first aspect of the present invention, an expansion tank is provided on the heating pipeline, and the expansion tank is located between the first heat exchanger and the electric heating tank.

[0012] According to some embodiments of the first aspect of the present invention, a pressure relief valve is provided on the heating pipeline, and the pressure relief valve is located between the expansion tank and the electric heating tank.

[0013] According to some embodiments of the first aspect of the present invention, an electric heating tank is provided on the heating pipeline, the electric heating tank is located between the pressure relief valve and the three-way valve, the electric heating tank is arranged vertically, and an exhaust valve is provided on the top of the electric heating tank.

[0014] According to some embodiments of the first aspect of the present invention, a throttling element is provided on the refrigerant pipeline, the throttling element being located between the refrigerant liquid pipe interface and the first heat exchanger.

[0015] An air conditioning system according to a second aspect of the present invention includes: a heat exchange device as described above; and an outdoor unit connected to the refrigerant liquid pipe interface and the refrigerant gas pipe interface. It has at least the following advantages: heating and domestic hot water can be provided using only one outdoor unit, reducing equipment purchase costs; the water tank is floor-mounted, reducing space occupation, lowering installation costs, and facilitating maintenance.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of a heat exchange device according to a first aspect embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the heat exchange device in heating mode;

[0020] Figure 3 for Figure 1 A schematic diagram of the heat exchange device in domestic hot water mode;

[0021] Figure 4 for Figure 1 A schematic diagram of the heat exchange device in cooling mode.

[0022] The attached icons are numbered as follows:

[0023] 100 casing, 110 mounting base, 111 drain pipe;

[0024] Refrigerant liquid pipe interface 210, refrigerant pipe 211, throttling element 212, refrigerant gas pipe interface 220, first heat exchanger 230, water inlet 240, heating pipe 241, water flow switch 242, expansion tank 243, pressure relief valve 244, water outlet 250, first water pump 260, electric heating tank 270, air vent valve 271, three-way valve 280, second heat exchanger 290, heat exchange pipe 291;

[0025] Inner tank 310, inner tank inlet 311, inner tank outlet 312, electric heating device 313, temperature sensing tube 314, cold water pipe 315, hot water pipe 316, sewage pipe 317, second water pump 320, circulating water inlet 321, circulating water outlet 322, circulating pipeline 323. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0028] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0029] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0030] Reference Figure 1 An embodiment of the first aspect of the present invention provides a heat exchange device in which a heating module is integrated into a water tank. The water tank includes a shell 100 and an inner liner 310 installed inside the shell 100. The shell 100 is provided with a mounting seat 110 for installing the heating module.

[0031] The heating module includes a refrigerant liquid pipe interface 210, a refrigerant gas pipe interface 220, a first heat exchanger 230, a water inlet 240, a water outlet 250, a first water pump 260, an electric heating tank 270, and a three-way valve 280. The refrigerant liquid pipe interface 210 and the refrigerant gas pipe interface 220 are located on the housing 100 for connecting to the outdoor unit. The water inlet 240 and the water outlet 250 are located on the housing 100 for connecting to the underfloor heating pipes. The first heat exchanger 230 has… There are refrigerant circuits and heating water circuits. The refrigerant gas pipe interface 220, the first heat exchanger 230, and the refrigerant liquid pipe interface 210 are connected sequentially through refrigerant pipe 211 to form the refrigerant circuit. The water inlet 240, the first water pump 260, the first heat exchanger 230, the electric heating tank 270, the three-way valve 280, and the water outlet 250 are connected sequentially through heating pipe 241 to form the heating water circuit. It can be understood that the inlet of the three-way valve 280 is connected to the electric heating tank 270. 70. The first outlet of the three-way valve 280 is connected to the water outlet 250. The second outlet of the three-way valve 280 is connected to a heat exchange pipe 291. A second heat exchanger 290 is installed on the heat exchange pipe 291. The outlet of the heat exchange pipe 291 is connected to the heating pipe 241 and is located between the water inlet 240 and the first water pump 260. The inner tank 310 has an inner tank inlet 311 and an inner tank outlet 312 for water inlet and outlet. An electric heater is also installed inside the inner tank 310. The device 313 and the temperature sensing tube 314 are used to directly heat the water in the inner tank 310. The electric heating device 313 is used to directly heat the water in the inner tank 310, and the temperature sensing tube 314 is used to detect the water temperature in the inner tank 310 so as to accurately control the water temperature. The inner tank 310 is also provided with a circulating water inlet 321 and a circulating water outlet 322. The circulating water outlet 322, the second water pump 320, the second heat exchanger 290 and the circulating water inlet 321 are connected in sequence through the circulating pipe 323 to form a circulating water loop.

[0032] By integrating the heating module and inner tank 310 into the casing 100 to form an integrated unit, the problems of high installation costs and large space occupation caused by separately installing heating and hot water systems and water tanks are eliminated, and the equipment procurement costs are reduced.

[0033] The heat exchanger has three modes, see reference. Figure 2 The first mode is the heating mode. The three-way valve 280 connects to the outlet 250. The first water pump 260 draws the heating return water from the inlet 240 into the first heat exchanger 230. At the same time, high-temperature and high-pressure refrigerant gas enters the first heat exchanger 230 from the refrigerant gas pipe interface 220. The heating return water and the refrigerant gas exchange heat in the first heat exchanger 230. The refrigerant gas cools down and becomes liquid and is discharged from the refrigerant liquid pipe interface 210. The heating return water is heated and then output to the underfloor heating pipe through the electric heating tank 270, the three-way valve 280, and the outlet 250. It can be understood that the electric heating tank 270 is activated according to the heating temperature requirements. The electric heating tank 270 can be used for secondary heating to meet the heating needs at higher temperatures.

[0034] Reference Figure 3 The second mode is hot water mode. The three-way valve 280 switches to connect to the heat exchange pipe 291. The first water pump 260 draws the heating return water into the first heat exchanger 230. Simultaneously, high-temperature, high-pressure refrigerant gas enters the first heat exchanger 230 from the refrigerant gas pipe interface 220. Heat exchange occurs between the heating return water and the refrigerant gas in the first heat exchanger 230. The refrigerant gas cools down, becomes liquid, and is discharged from the refrigerant liquid pipe interface 210. The heating return water is heated, and then the high-temperature heating return water passes through the electric heating tank 270, the three-way valve 280, and the heat exchange pipe 291 into the second heat exchanger 290. The second water pump 320 then circulates the circulating water in the inner tank 310 (i.e., the water inside the inner tank 310)... Water is drawn into the second heat exchanger 290, where the high-temperature heating return water and circulating water exchange heat. The circulating water is heated and then returns to the inner tank 310 from the circulating water inlet 321, raising the water temperature inside the inner tank 310 and producing domestic hot water. It is understood that the electric heating tank 270 is activated based on the domestic hot water temperature requirement. Using the electric heating tank 270 for secondary heating can further increase the temperature of the heating return water input to the second heat exchanger 290, producing higher-temperature domestic hot water. In addition, the electric heating device 313 inside the inner tank 310 can also directly increase the temperature of the domestic hot water to meet the user's needs.

[0035] Reference Figure 4 The third mode is cooling mode. In this mode, the three-way valve 280 connects to the outlet 250. The first water pump 260 draws heating return water from the inlet 240 into the first heat exchanger 230. Simultaneously, refrigerant liquid enters the first heat exchanger 230 from the refrigerant liquid pipe interface 210. Heat exchange occurs between the heating return water and the refrigerant liquid in the first heat exchanger 230. The refrigerant liquid absorbs heat, turns into gas, and is discharged from the refrigerant gas pipe interface 220. The heating return water is cooled to 7-18°C. This cooled water is then output to the cooling terminal via the electric heating tank 270, the three-way valve 280, and the outlet 250 to produce cool air. In cooling mode, the inlet 240 and outlet 250 are switched to connect to the cooling terminal, while the electric heating tank 270 is not activated and only supplies cold water.

[0036] Reference Figure 1 According to some embodiments of the first aspect of the present invention, the heating module is arranged above the mounting base 110, which is arranged above the inner tank 310. With this structure, the water tank can be placed vertically on the ground without installation, saving installation costs. Furthermore, since the inner tank 310 contains a large amount of water and is heavy, placing the inner tank 310 at the lower part of the tank shell 100 ensures a stable center of gravity and high safety.

[0037] Reference Figure 1According to some embodiments of the first aspect of the present invention, the mounting base 110 is provided with a water receiving part for receiving water leakage from the heating module, and a drain pipe 111 is provided at the lower position of the water receiving part to drain away the leakage and ensure stable operation of the integrated unit.

[0038] Reference Figure 1 According to some embodiments of the first aspect of the present invention, the inner tank inlet 311 is vertically arranged at the lower part of the casing 100. The inner tank inlet 311 is connected to a cold water pipe 315, which extends to the lower part of the inner cavity of the inner tank 310. The inner tank outlet 312 is arranged at the upper part of the casing 100, and is connected to a hot water pipe 316, which extends to the upper part of the inner cavity of the inner tank 310. Cold water is injected into the inner tank 310 through the inner tank inlet 311 and the cold water pipe 315, and the produced hot water is output from the hot water pipe 316 and the inner tank outlet 312 for user use. Because cold water has a higher specific gravity, the cold water pipe 315 is arranged below the hot water pipe 316. Furthermore, to facilitate cleaning of the inner tank 310, a drain pipe 317 is provided at the lower end of the inner tank 310 to drain wastewater. An insulation layer surrounding the inner liner 310 is also provided inside the shell 100 to reduce heat loss and help reduce energy consumption. The circulating water inlet 321 and the circulating water outlet 322 are arranged on the other side of the inner liner 310, away from the cold water pipe 315 and the hot water pipe 316. Similarly, considering that the specific gravity of cold water is greater, the circulating water outlet 322 is arranged below the circulating water inlet 321.

[0039] Reference Figure 1 According to some embodiments of the first aspect of the present invention, a flow switch 242 is provided on the heating pipe 241, and the flow switch 242 is located between the outlet of the heat exchange pipe 291 and the first water pump 260. The flow switch 242 is used to shut off the water circuit and cut off the water circuit when the pump is stopped.

[0040] Reference Figure 1 According to some embodiments of the first aspect of the present invention, an expansion tank 243 is provided on the heating pipe 241, and the expansion tank 243 is located between the first heat exchanger 230 and the three-way valve 280. Since the heating return water is heated in the first heat exchanger 230, water vapor is generated. The expansion tank 243 absorbs the water vapor, eliminating the risk of excessive pressure, ensuring the pressure in the heating pipe 241 is stable, and reducing the risk of leakage.

[0041] Reference Figure 1 According to some embodiments of the first aspect of the present invention, a pressure relief valve 244 is further provided on the heating pipe 241, and the pressure relief valve 244 is located between the expansion tank 243 and the three-way valve 280. The pressure relief valve 244 opens when the pressure in the heating pipe 241 exceeds the limit, thereby releasing pressure and preventing the heating pipe 241 from bursting.

[0042] Reference Figure 1According to some embodiments of the first aspect of the present invention, the electric heating tank 270 is arranged vertically, and an exhaust valve 271 is provided on the top of the electric heating tank 270. The exhaust valve 271 is used to discharge the water vapor generated by the electric heating tank 270, prevent the pressure inside the electric heating tank 270 from being too high, and maintain the stable operation of the electric heating tank 270.

[0043] Reference Figure 1 According to some embodiments of the first aspect of the present invention, a throttling element 212 is provided on the refrigerant pipeline 211, and the throttling element 212 is located between the refrigerant liquid pipe interface 210 and the first heat exchanger 230. The throttling element 212 is used to control the refrigerant flow rate and ensure stable operation. The throttling element 212 is at least one of an electronic expansion valve, a thermostatic expansion valve, and a capillary tube.

[0044] An air conditioning system according to a second aspect of the present invention includes: a heat exchange device as described above and an outdoor unit (not shown in the figure). The outdoor unit is connected to a refrigerant liquid pipe interface 210 and a refrigerant gas pipe interface 220, and the outdoor unit provides high-temperature, high-pressure refrigerant gas or low-temperature refrigerant liquid. The air conditioning system can provide both heating hot water and domestic hot water using only one outdoor unit, reducing equipment procurement costs. The water tank is floor-mounted, reducing space occupation, lowering installation costs, and facilitating maintenance.

[0045] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A heat exchange device, characterized in that, include: A water tank, comprising a tank shell and an inner liner, wherein a mounting base is provided on the tank shell; A heating module is installed on the mounting base. The heating module is equipped with a refrigerant liquid pipe interface, a refrigerant gas pipe interface, a first heat exchanger, a first water pump, an inlet, and an outlet. The refrigerant liquid pipe interface and the refrigerant gas pipe interface are arranged on the casing for connection to the outdoor unit of the air conditioning system. The first heat exchanger has a refrigerant circuit and a heating water circuit. The refrigerant circuit is formed by connecting the refrigerant gas pipe interface, the first heat exchanger, and the refrigerant liquid pipe interface in sequence through refrigerant pipelines. The heating water circuit is formed by connecting the inlet, the first water pump, the first heat exchanger, a three-way valve, and the outlet in sequence through heating pipelines. The third port of the three-way valve is connected to a heat exchange pipeline. A second heat exchanger is installed on the heat exchange pipeline. The outlet of the heat exchange pipeline is connected to the heating pipeline and is located between the inlet and the first water pump. When the heat exchange device is in heating operation mode, high-temperature and high-pressure refrigerant gas enters the first heat exchanger, and the heating return water and the refrigerant gas exchange heat in the first heat exchanger. The inner tank has a circulating water circuit, which is formed by the circulating water outlet, the second water pump, the second heat exchanger and the circulating water inlet on the inner tank being connected in sequence through a circulating pipeline. When the heat exchange device is in hot water mode, the three-way valve is switched to connect the heat exchange pipeline. The heating return water is heated by the first heat exchanger and then enters the second heat exchanger to exchange heat with the circulating water in the inner tank.

2. The heat exchange device according to claim 1, characterized in that, The mounting base is arranged above the inner liner, and the heating module is arranged above the mounting base.

3. The heat exchange device according to claim 2, characterized in that, The mounting base is equipped with a water receiving part.

4. The heat exchange device according to claim 3, characterized in that, The inner tank has an inner tank inlet and an inner tank outlet. The inner tank inlet is located at the lower part of the shell and is connected to a cold water pipe that extends to the lower part of the inner cavity of the inner tank. The inner tank outlet is located at the upper part of the shell and is connected to a hot water pipe that extends to the upper part of the inner cavity of the inner tank.

5. The heat exchange device according to claim 1, characterized in that, A flow switch is installed on the heating pipeline, and the flow switch is located between the outlet of the heat exchange pipeline and the first water pump.

6. The heat exchange device according to claim 5, characterized in that, An expansion tank is installed on the heating pipeline, and the expansion tank is located between the first heat exchanger and the three-way valve.

7. The heat exchange device according to claim 6, characterized in that, A pressure relief valve is installed on the heating pipeline, and the pressure relief valve is located between the expansion tank and the three-way valve.

8. The heat exchange device according to claim 1, characterized in that, An electric heating tank is installed on the heating pipeline, and the electric heating tank is located between the first heat exchanger and the three-way valve.

9. The heat exchange device according to claim 1, characterized in that, A throttling element is installed on the refrigerant pipeline, and the throttling element is located between the refrigerant liquid pipe interface and the first heat exchanger.

10. An air conditioning system, characterized in that, include: The heat exchange device as described in any one of claims 1 to 9; The outdoor unit is connected to the refrigerant liquid pipe interface and the refrigerant gas pipe interface.

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