Heat exchange device and air conditioning system

Abstract

The present invention discloses a heat exchange device and an air conditioning system. The heat exchange device includes: a water tank, which includes a tank shell and an inner tank, and an installation seat is provided on the tank shell; a heating module, which is installed on the installation seat. The heating module is provided with a refrigerant liquid pipe interface, a refrigerant gas pipe interface, a heat exchanger, a water pump, a water inlet and a water outlet. The heat exchanger has a refrigerant circuit and a heating water circuit. The refrigerant circuit is formed by sequentially connecting the refrigerant gas pipe interface, the heat exchanger and the refrigerant liquid pipe interface through refrigerant pipelines. The heating water circuit is formed by sequentially connecting the water inlet, the water pump, the heat exchanger, a three-way valve and the water outlet through heating pipelines; a heat exchange coil, which is arranged inside the inner tank. The inlet of the heat exchange coil is connected to the three-way valve, and the outlet of the heat exchange coil communicates with the heating pipeline and is located between the water inlet and the water pump. The heating hot water system and the domestic hot water system are integrated into one. The water tank is arranged in a floor-standing manner, reducing the occupied space and lowering the installation cost and equipment purchase cost.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning systems, and particularly to a heat exchange device and an air conditioning system applying the same. Background Art

[0002] In the prior art, some household air conditioning systems include a heating hot water system and a domestic hot water system. The heating hot water system is used for winter heating, and the domestic hot water system is used for supplying hot water in winter. The heating hot water system includes a hydraulic module and an outdoor unit, and the domestic hot water system includes an inner tank and an outdoor unit. The hydraulic module is installed in a wall-mounted manner, and the inner tank is installed in a floor-standing manner, occupying a relatively large space, with a high installation cost, and the cost for the user to purchase two sets of system equipment is also relatively high. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a heat exchange device that integrates the heating hot water system and the domestic hot water system, reduces the occupied space, and shares one outdoor unit, which is beneficial to reducing the equipment cost.

[0004] The present invention also provides an air conditioning system including the above heat exchange device.

[0005] The heat exchange device according to the first aspect embodiment of the present invention includes: a water tank including a tank shell and an inner tank, and an installation seat is provided on the tank shell; a heating module installed on the installation seat, the heating module is provided with a refrigerant liquid pipe interface, a refrigerant gas pipe interface, a heat exchanger, a water pump, a water inlet and a water outlet, the heat exchanger has a refrigerant circuit and a heating water circuit, the refrigerant circuit is formed by sequentially connecting the refrigerant gas pipe interface, the heat exchanger and the refrigerant liquid pipe interface through refrigerant pipelines, and the heating water circuit is formed by sequentially connecting the water inlet, the water pump, the heat exchanger, a three-way valve and the water outlet through heating pipelines; a heat exchange coil disposed inside the inner tank, an inlet of the heat exchange coil is connected to the three-way valve, and an outlet of the heat exchange coil communicates with the heating pipeline and is located between the water inlet and the water pump.

[0006] The heat exchange device according to the embodiment of the first aspect of the present invention has at least the following beneficial effects: In the heating mode, the heating return water enters the heat exchanger from the water inlet, and at the same time, the high-temperature and high-pressure refrigerant gas enters the heat exchanger from the refrigerant gas pipe interface. The heating return water and the refrigerant gas exchange heat in the heat exchanger, and the heating return water is heated. The three-way valve connects to the water outlet to deliver the high-temperature heating return water to the floor heating pipeline; In the hot water mode, the three-way valve connects to the inlet of the heat exchange coil, and the water pump transports the heat exchange return water in the heat exchange coil to the heat exchanger. At the same time, the high-temperature and high-pressure refrigerant gas enters the heat exchanger from the refrigerant gas pipe interface. The heat exchange return water and the refrigerant gas exchange heat in the heat exchanger, and the heat exchange return water is heated. The high-temperature heat exchange return water passes through the three-way valve and enters the heat exchange coil, and the water in the inner tank is heated by the high-temperature heat exchange return water inside the inner tank to produce domestic hot water. The heating hot water system and the domestic hot water system are integrated into one, and the water tank is arranged in a floor-standing manner, reducing the occupied space and lowering the installation cost and equipment purchase cost.

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

[0008] According to some embodiments of the first aspect of the present invention, a water receiving part is provided on the mounting seat.

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

[0010] According to some embodiments of the first aspect of the present invention, a water flow switch is provided on the heating pipeline, and the water flow switch is located between the heat exchanger and the 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 heat exchanger and the three-way valve.

[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 three-way valve.

[0013] According to some embodiments of the first aspect of the present invention, an electric heating tank is provided on the heating pipeline, and 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 at 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, and the throttling element is located between the refrigerant liquid pipe interface and the heat exchanger.

[0015] An air conditioning system according to an embodiment of the second aspect of the present invention includes: the heat exchange device as described above; an outdoor unit connected to the refrigerant liquid pipe interface and the refrigerant gas pipe interface. It has at least the following beneficial effects: Heating and providing domestic hot water can be achieved with only one outdoor unit, reducing the equipment procurement cost. The integrated machine integrates a heating hot water system and a domestic hot water system, and is arranged in a floor-standing manner, reducing the occupied space, reducing the installation cost, and facilitating maintenance.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0021] Figure 4 is Figure 1 a schematic diagram of the heat exchange device in the refrigeration mode.

[0022] The reference numerals in the drawings are as follows:

[0023] Cabinet shell 100, mounting seat 110, drain pipe 111;

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

[0025] Inner tank 310, inner tank water inlet 311, inner tank water outlet 312, electric heating device 313, temperature sensing tube 314, cold water pipe 315, hot water pipe 316, sewage pipe 317, heat exchange coil 320. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which 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 by referring to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0027] In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0028] In the description of the present invention, if the first and the second are described, it is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0030] Referring to Figure 1 , an embodiment of the first aspect of the present invention provides a heat exchange device, in which a heating module is integrated in a water tank. The water tank includes a tank shell 100 and an inner tank 310 installed in the tank shell 100. An installation seat 110 for installing the heating module is provided on the tank shell 100.

[0031] The heating module includes a refrigerant liquid pipe interface 210, a refrigerant gas pipe interface 220, a heat exchanger 230, a water inlet 240, a water outlet 250, a 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 arranged on the housing 100 for connecting to the outdoor unit, and the water inlet 240 and the water outlet 250 are arranged on the housing 100 for connecting to the floor heating pipeline. The heat exchanger 230 has a refrigerant circuit and a heating water circuit. The refrigerant gas pipe interface 220, the heat exchanger 230, and the refrigerant liquid pipe interface 210 are sequentially connected through a refrigerant pipeline 211 to form a refrigerant circuit. The water inlet 240, the first water pump 260, the heat exchanger 230, the electric heating tank 270, the three-way valve 280, and the water outlet 250 are sequentially connected through a heating pipeline 241 to form a heating water circuit. The heat exchange coil 320 is placed inside the inner tank 310. The inlet of the heat exchange coil 320 is connected to the three-way valve 280, and the outlet of the heat exchange coil 320 communicates with the heating pipeline 241 and is located between the water inlet 240 and the water pump 260. It can be understood that the inlet of the three-way valve 280 is connected to the electric heating tank 270, the first outlet of the three-way valve 280 is connected to the water outlet 250, and the second outlet of the three-way valve 280 is connected to the inlet of the heat exchange coil 320. The inner tank 310 has an inner tank water inlet 311 and an inner tank water outlet 312 for water inlet and outlet. An electric heating device 313 and a temperature sensing tube 314 are also arranged inside the inner tank 310. The electric heating device 313 is used to directly heat the water inside the inner tank 310, and the temperature sensing tube 314 is used to detect the water temperature inside the inner tank 310 to accurately control the water temperature.

[0032] Integrating the heating module and the inner tank 310 into the housing 100 to form an all-in-one machine eliminates the problems of high installation costs and large space occupation caused by separately installing the heating and hot water system and the water tank, and also reduces the equipment procurement cost.

[0033] The heat exchange device has three modes. Refer to Figure 2 , the first one: heating mode. The three-way valve 280 connects to the water outlet 250. The water pump 260 is used to pump the heating return water from the water inlet 240 into the heat exchanger 230. At the same time, the high-temperature and high-pressure refrigerant gas enters the heat exchanger 230 from the refrigerant gas pipe interface 220. The heating return water and the refrigerant gas conduct heat exchange in the heat exchanger 230. The refrigerant gas cools down and turns into a liquid and is discharged from the refrigerant liquid pipe interface 210. The heating return water is heated, and then the heating return water is output to the floor heating pipeline through the electric heating tank 270, the three-way valve 280, and the water outlet 250. It can be understood that according to the heating temperature requirement, it is determined whether the electric heating tank 270 is started, and the electric heating tank 270 is used for secondary heating to meet the heating heat of a higher temperature.

[0034] Refer to Figure 3, the second type: hot water mode. The three-way valve 280 is switched to connect to the inlet of the heat exchange coil 320. The water pump 260 is used to pump the heat exchange return water in the heat exchange coil 320 into the heat exchanger 230. At the same time, the high-temperature and high-pressure refrigerant gas enters the heat exchanger 230 from the refrigerant gas pipe interface 220. The heat exchange return water and the refrigerant gas conduct heat exchange in the heat exchanger 230. The refrigerant gas cools down and turns into a liquid and is discharged from the refrigerant liquid pipe interface 210. The heat exchange return water is heated, and then the heat exchange return water enters the heat exchange coil 320 through the electric heating tank 270 and the three-way valve 280, and uses the high-temperature heat exchange return water inside the inner tank 310 to heat the water in the inner tank 310 to produce domestic hot water. It can be understood that according to the temperature requirement of domestic hot water, it is determined whether the electric heating tank 270 is started. Using the electric heating tank 270 for secondary heating can further increase the temperature of the heat exchange return water and can produce higher-temperature domestic hot water. In addition, an electric heating device 313 is provided inside the inner tank 310, which can further increase the temperature of domestic hot water to meet the needs of users.

[0035] Refer to Figure 4 , the third type: refrigeration mode. The three-way valve 280 connects to the water outlet 250. The water pump 260 is used to pump the heating return water from the water inlet 240 into the heat exchanger 230. At the same time, the refrigerant liquid enters the heat exchanger 230 from the refrigerant liquid pipe interface 210. The heating return water and the refrigerant conduct heat exchange in the heat exchanger 230. The refrigerant liquid absorbs heat and turns into a gas and is discharged from the refrigerant gas pipe interface 220. The heating return water cools down to cold water at 7 - 18 °C, and then the cold water is output to the refrigeration terminal through the electric heating tank 270, the three-way valve 280, and the water outlet 250 for producing cold air. It can be understood that in the refrigeration mode, the water inlet 240 and the water outlet 250 are switched to connect to the refrigeration terminal, and the electric heating tank 270 will not be started, and only cold water is allowed to pass through.

[0036] Refer to Figure 1 , according to some embodiments of the first aspect of the present invention, the heating module is arranged above the mounting seat 110, and the mounting seat 110 is arranged above the inner tank 310. With the above structure, the water tank can be placed vertically on the ground without installation, saving installation costs. Moreover, a large amount of water is contained in the inner tank 310, and the weight is large. By arranging the inner tank 310 at the lower part of the tank shell 100, the center of gravity of the water tank is stable and the safety is high.

[0037] Refer to Figure 1 , according to some embodiments of the first aspect of the present invention, the mounting seat 110 is provided with a water receiving part for receiving the leaked water of the heating module, and a drain pipe 111 is arranged at the lower position of the water receiving part to drain the leaked water away to ensure the stable operation of the integrated machine.

[0038] Refer to Figure 1, according to some embodiments of the first aspect of the present invention, the inner tank water inlet 311 is arranged at the lower part of the cabinet shell 100. The inner tank water inlet 311 is connected to a cold water pipe 315, and the cold water pipe 315 extends to the lower part of the inner cavity of the inner tank 100. The inner tank water outlet 312 is arranged at the upper part of the cabinet shell 100. The inner tank water outlet 312 is connected to a hot water pipe 316, and the hot water pipe 316 extends to the upper part of the inner cavity of the inner tank 310. Cold water is injected into the inner tank 310 from the inner tank water 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 water outlet 312 for users to use. Since cold water has a greater specific gravity, the cold water pipe 315 is arranged below the hot water pipe 316. To facilitate cleaning of the inner tank 310, a sewage pipe 317 is provided at the lower end of the inner tank 310 to drain away sewage. A heat insulation layer surrounding the inner tank 310 is also provided in the cabinet shell 100 to reduce heat loss and is beneficial to reducing energy consumption.

[0039] Refer to Figure 1 , according to some embodiments of the first aspect of the present invention, a water flow switch 242 is provided on the heating pipeline 241. The water flow switch 242 is located between the outlet of the heat exchange coil 320 and the water pump. The water flow switch 242 is used to close the water circuit and cut off the water circuit in the shutdown state.

[0040] Refer to Figure 1 , according to some embodiments of the first aspect of the present invention, an expansion tank 243 is provided on the heating pipeline 241. The expansion tank 243 is located between the heat exchanger 230 and the three-way valve 280. Since the heating return water or the heat exchange return water is heated in the heat exchanger 230, water vapor will be generated. The expansion tank 243 is used to absorb the water vapor to ensure the pressure stability in the heating pipeline 241 and reduce the leakage risk.

[0041] Refer to 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 pipeline 241. 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 pipeline 241 exceeds the limit to achieve pressure relief and prevent the heating pipeline 241 from bursting.

[0042] Refer to Figure 1 , according to some embodiments of the first aspect of the present invention, the electric heating tank 270 is vertically arranged, and an exhaust valve 271 is provided at 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 in the electric heating tank 270 from being too high, and maintain the stable operation of the electric heating tank 270.

[0043] Refer to 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 heat exchanger 230. The throttling element 212 is used to control the refrigerant flow rate to ensure stable operation, and 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 an embodiment of the second aspect of the present invention includes: the heat exchange device and an outdoor unit (not shown in the figure) as described above. The outdoor unit is connected to the refrigerant liquid pipe interface 210 and the refrigerant gas pipe interface 220, and provides high-temperature and high-pressure refrigerant gas or refrigerant liquid. The air conditioning system can achieve heating and supply domestic hot water with one outdoor unit, reducing the equipment procurement cost. The integrated machine integrates a heating hot water system and a domestic hot water system, and is arranged in a floor-standing manner, reducing the occupied space, reducing the installation cost, and being convenient for maintenance.

[0045] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. Heat exchange device, characterized in that, Comprising: A water tank, including a tank shell and an inner tank, and an installation seat is arranged on the tank shell; A heating module, installed on the installation seat, the heating module is provided with a refrigerant liquid pipe interface, a refrigerant gas pipe interface, a heat exchanger, a water pump, a water inlet and a water outlet, the refrigerant liquid pipe interface and the refrigerant gas pipe interface are arranged on the tank shell for connecting to an outdoor unit, the heat exchanger has a refrigerant circuit and a heating water circuit, the refrigerant circuit is formed by sequentially connecting the refrigerant gas pipe interface, the heat exchanger and the refrigerant liquid pipe interface through refrigerant pipelines, and the heating water circuit is formed by sequentially connecting the water inlet, the water pump, the heat exchanger, a three-way valve and the water outlet through heating pipelines; The heat exchange device includes a heating mode. In the heating mode, the three-way valve connects the water outlet, the water pump pumps the heating return water into the heat exchanger, and after the heating return water is heated by the high-temperature and high-pressure refrigerant gas in the heat exchanger, it flows to the water outlet through the three-way valve; A heat exchange coil is arranged inside the inner tank, the inlet of the heat exchange coil is connected to the three-way valve, and the outlet of the heat exchange coil communicates with the heating pipeline and is located between the water inlet and the water pump; The heat exchange device includes a hot water mode. In the hot water mode, the three-way valve switches to connect the inlet, the water pump pumps the heat exchange return water in the heat exchange coil into the heat exchanger, the heat exchange return water is heated by the high-temperature and high-pressure refrigerant gas in the heat exchanger, and then the heat exchange return water enters the heat exchange coil through the three-way valve to heat the water in the inner tank to produce domestic hot water.

2. The heat exchange device according to claim 1, wherein The installation seat is arranged above the inner tank, and the heating module is arranged above the installation seat.

3. The heat exchange device according to claim 2, wherein A water receiving part is arranged on the installation seat.

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

5. The heat exchange device according to claim 1, wherein A water flow switch is arranged on the heating pipeline, and the water flow switch is located between the outlet of the heat exchange coil and the water pump.

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

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

9. The heat exchange device according to claim 1, wherein A throttling element is arranged on the refrigerant pipeline, and the throttling element is located between the refrigerant liquid pipe interface and the heat exchanger.

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

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