Connecting device for fluid system and heat exchange equipment

Abstract

The utility model relates to the field of water heaters, and provides a connecting device and heat exchange equipment for a fluid system, the heat exchange equipment comprises an inlet channel, a heat exchange channel, a delivery channel, the connecting device and a heat exchanger arranged at the heat exchange channel, the connecting device comprises a base, an elastic leather film, a valve core and an elastic piece, the leather membrane is arranged at the first opening of the base, the leather membrane and the base jointly define a second channel, a first channel is further formed in the base, the valve element is connected to the leather membrane and used for sealing the communicating opening, and the elastic piece is used for making the valve element abut against the communicating opening so that the first channel and the second channel can be separated. When heat exchange equipment is a gas water heater, the connecting device is adopted, the interlayer cold water phenomenon and the interlayer hot water phenomenon can be improved, and the connecting device is of a pure mechanical structure and is low in cost, convenient to install and stable in performance.

Description

Technical Field

[0001] The utility model relates to the field of water heaters, in particular to a connecting device and a heat exchange device for a fluid system. Background Art

[0002] Gas water heaters generally include a fluid system and a heat exchanger. The fluid system includes an inlet channel, a heat exchange channel, and an outlet channel that are connected in sequence. The heat exchange channel corresponds to the heat exchanger setting of the gas water heater. The inlet channel is connected to the inlet end, that is, connected to the tap water pipe, and the outlet channel is connected to the outlet end, that is, connected to the water valve at the user end. During the use of the gas water heater, the water valve is closed after being opened for a period of time. When the water valve is opened again in a short period of time, the outlet water temperature at the water valve will go through the following stages in sequence: slightly low temperature, very high temperature, very low temperature, and suitable temperature. The slightly low temperature stage is caused by the temperature of the residual hot water in the outlet channel slightly decreasing in a short period of time; the very high temperature stage is caused by the temperature rise when the water is stopped. When the gas water heater stops working, the residual smoke temperature in the heat exchanger will continue to heat the water in the heat exchange channel, making the water temperature in the heat exchange channel higher than the normal use temperature. This phenomenon is called interlayer hot water; the very low temperature stage is caused by the residual cold water in the channel entering the heat exchange channel when the gas water heater is turned on again. It cannot be heated to the target temperature. This phenomenon is called interlayer cold water. The presence of interlayer hot water and interlayer cold water will affect the user's use, and the interlayer hot water may even cause scalding to the user.

[0003] In the prior art, a bypass pipe is provided between the inlet channel and the outlet channel as a connecting channel, and a solenoid valve is provided to control the on-off of the bypass pipe. After the gas water heater is turned off, the solenoid valve is controlled to open the bypass pipe, so that the water in the inlet channel, the heat exchange channel, the outlet channel, and the bypass pipe can be mixed, and the water flow path is switched according to the start and stop of the water heater, thereby improving the interlayer hot water and interlayer cold water phenomenon. Using a solenoid valve to control the on-off of the pipeline to switch the water flow path is costly, and the solenoid valve requires electrical connection, which is inconvenient to install. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art that the gas water heater has high cost and is inconvenient to install, and to provide a connecting device and a heat exchange device for a fluid system.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A connecting device for a fluid system, comprising:

[0007] A base and an elastic membrane, wherein the base is defined with a first opening, a first channel and a communication port, the membrane is disposed at the first opening and defines a second channel together with the base, the first channel and the second channel are communicated through the communication port, and the first channel and the second channel are both communicated with the outer side of the base;

[0008] A valve core, the valve core is connected to the membrane, and the valve core is used to close the communication port;

[0009] An elastic member, used for abutting the valve core against the communication port;

[0010] The membrane and the valve core are arranged such that when the internal pressure of the membrane is greater than the external pressure, the membrane is deformed in a direction away from the communication port.

[0011] In this solution, the first channel and the second channel are connected to the outside of the base, so that the fluid outside the connecting device can flow into the first channel and the second channel.

[0012] The membrane and the base together define a second channel. When the pressure in the second channel changes, the difference between the internal pressure and the external pressure of the membrane will change, thereby causing the membrane to deform. The change in the degree of deformation of the membrane will cause the magnitude of the force of the membrane on the valve core to change. When the force of the membrane on the valve core is less than the force of the elastic member on the valve core, the valve core will abut against the connecting port under the force of the elastic member to separate the first channel and the second channel; when the membrane deforms in a direction away from the connecting port, and the force of the membrane on the valve core overcomes the force of the elastic member on the valve core, the membrane will drive the valve core to move away from the connecting port to open the connecting port, so that the first channel and the second channel are connected.

[0013] The opening and closing of the connecting port in the connecting device can be achieved through a purely mechanical structure. On the one hand, there is no need to set up an additional solenoid valve to change the connecting path, which is low-cost and easy to install; on the other hand, the performance is stable.

[0014] When the connection device is applied to a gas water heater, the first channel and the second channel can be connected to the cold water inlet pipe of the water heater, and the other can be connected to the hot water outlet pipe of the water heater. When the user opens the water valve to use water, the second channel is connected to the external environment, so that the internal and external pressures of the membrane are consistent, both are atmospheric pressure. At this time, the valve core abuts against the connecting port under the action of the elastic member, and the first channel and the second channel are separated, which does not affect the normal use of the water heater. When the user closes the water valve to stop using water, the second channel is closed relative to the external environment, and the pressure inside the membrane becomes water pressure, so that the internal pressure of the membrane is greater than the external pressure, and the membrane deforms in the direction away from the connecting port. The force of the membrane on the valve core increases, so that the valve core overcomes the force of the elastic member to move away and open the connecting port, so that the cold water inlet pipe and the hot water outlet pipe are connected through the first channel and the second channel, so that the cold water and hot water can be mixed, the hot water temperature is reduced, and the cold water temperature is increased, thereby improving the phenomenon of sandwich cold water and sandwich hot water.

[0015] Preferably, the valve core and the elastic member are arranged in the second channel, and the elastic member is sleeved on the valve core.

[0016] In this solution, the valve core and the elastic member are arranged in the second channel, so that the connection device has a compact structure. The elastic member is sleeved on the valve core, and the valve core can guide the elastic member, which makes the connection device compact on the one hand and makes the elastic member's force stable and reliable on the other hand.

[0017] Preferably, the valve core is provided with a first flange, the first flange is used to close the connecting port, one end of the elastic member in the expansion and contraction direction abuts or is fixedly connected to the first flange, and the other end abuts or is fixedly connected to the first opening of the base.

[0018] In this solution, the first flange can, on the one hand, limit the end of the elastic member, and the limiting structure is simple and reliable; on the other hand, it can increase the surface area to close the connecting port, and the structure of closing the connecting port is simple and reliable; thus, the structure of the connecting device is simple and reliable.

[0019] Preferably, the valve core is arranged in the second channel, and the elastic member is arranged in the first channel.

[0020] Preferably, the connecting device further comprises a connecting piece arranged in the first channel, the elastic piece is sleeved on the connecting piece, and a portion of one of the valve core and the connecting piece passes through the communicating port to be connected to the other.

[0021] In this solution, a connecting member is provided to transmit the force of the valve core and the elastic member. On the one hand, this simplifies the structure of the connecting device; on the other hand, it can serve as a guide for the elastic member, so that the force of the elastic member is stable and reliable.

[0022] Preferably, a second flange is provided at one end of the connecting member away from the valve core, one end of the elastic member in the expansion and contraction direction abuts or is fixedly connected to the second flange, and the other end abuts or is fixedly connected to the connecting port of the base.

[0023] In this solution, a second flange is provided, which, on the one hand, can limit the end of the elastic member, and the limiting structure is simple and reliable; on the other hand, it can increase the surface area to prevent the base from being damaged when the connecting member abuts against the wall of the first channel of the base.

[0024] Preferably, the base includes a base body and a base cover, the base cover is arranged at the second opening of the base body and defines the first channel together with the base body, and the elastic member and the connecting member are arranged at the base cover.

[0025] In this solution, a base cover is provided to facilitate opening the base cover to install and maintain the elastic member and the connecting member.

[0026] Preferably, the membrane is detachably connected to the first opening.

[0027] In the present solution, the membrane is detachably arranged on the base. On the first hand, it is convenient to place the valve core into the base from the first opening to install the valve core, and it is also convenient to remove the membrane and take out the valve core from the first opening for maintenance; on the second hand, it is convenient to regularly replace the membrane so that the membrane maintains good elasticity and improves the reliability of the connecting device; on the third hand, it is convenient to replace the membrane according to the specific application scenario so that the material, size and elastic performance of the membrane can meet the specific use requirements and improve the versatility of the connecting device.

[0028] Preferably, the valve core is connected to the middle part of the membrane.

[0029] In this solution, the valve core and the diaphragm are dynamically connected in the middle of the diaphragm, which is convenient for increasing the maximum deformation amplitude of the diaphragm and stabilizing the deformation direction of the diaphragm, thereby improving the reliability of the diaphragm driving the valve core to move to open the connecting port.

[0030] Preferably, a first flange is provided on the valve core, and the first flange is used to close the communication port.

[0031] In this solution, the first flange can increase the surface area to close the communication port, thereby improving the reliability of the valve core in closing the communication port.

[0032] Preferably, the valve core and the membrane are fixedly connected.

[0033] In this solution, the valve core and the diaphragm are fixedly connected, which can improve the reliability of the diaphragm deformation driving the movement of the valve core.

[0034] Preferably, the base further defines a third opening and a fourth opening, and both ends of the first channel flow path are connected to the outside of the base through the third opening and the fourth opening;

[0035] The base further defines a fifth opening and a sixth opening, and both ends of the second channel flow path communicate with the outside of the base through the fifth opening and the sixth opening.

[0036] In the present scheme, such an arrangement can, on the one hand, improve the sealing performance of the connecting device to the valve core, elastic parts and other structures inside the base, and avoid damage to the internal structure of the base during the transportation or installation of the connecting device; on the second hand, it is convenient to connect the first channel and the second channel of the connecting device with the channel in the fluid system; on the third hand, by setting the size standards of the third opening, the fourth opening, the fifth opening and the sixth opening, it is also convenient to achieve standardization of the connecting device.

[0037] A heat exchange device, comprising a heat exchanger and a fluid system, wherein the fluid system comprises an inlet channel, a heat exchange channel and an outlet channel which are connected in sequence, the heat exchanger is arranged at the heat exchange channel, and the heat exchange device also comprises a connecting device for the fluid system as described in any of the above technical solutions, wherein one of the first channel and the second channel is connected to the inlet channel and the other is connected to the outlet channel.

[0038] In this solution, the connecting device is applied to heat exchange equipment such as water heaters to realize the switching of fluid flow paths according to the start and stop of the heat exchange equipment, and to improve the phenomenon of overheating or overcooling of the outflowing fluid after the heat exchange equipment is briefly closed and then reopened. There is no need to set up a solenoid valve to change the switching of the fluid flow path, which can reduce the cost of the heat exchange equipment and make the installation of the heat exchange equipment convenient.

[0039] The positive and progressive effects of the utility model are:

[0040] The opening and closing of the connecting port in the connecting device can be achieved through a purely mechanical structure. On the one hand, there is no need to set up an additional solenoid valve to change the connecting path, which is low-cost and easy to install; on the other hand, the performance is stable.

[0041] When the connecting device is applied to heat exchange equipment such as water heaters to realize fluid flow path switching according to the start and stop of the heat exchange equipment, and to improve the phenomenon of overheating or overcooling of the outflowing fluid after the heat exchange equipment is briefly closed and then reopened, there is no need to set up a solenoid valve to switch the connection path, which can reduce the cost of the heat exchange equipment and make the installation of the heat exchange equipment convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the structure of the heat exchange device of Example 1 of the utility model;

[0043] Figure 2 This is a schematic diagram of the structure of the connection device when the heat exchange device of Example 1 of the utility model is in use;

[0044] Figure 3 This is a schematic diagram of the structure of the connection device when the heat exchange device of Example 1 of the utility model is not in use;

[0045] Figure 4 This is a partial structural schematic diagram of the connecting device of Example 1 of the utility model;

[0046] Figure 5 for Figure 4 Enlarged view of part A in the middle;

[0047] Figure 6 This is a schematic diagram of the structure of the base of Example 1 of the utility model;

[0048] Figure 7 This is a schematic diagram of the structure of the base body of Example 1 of the utility model;

[0049] Figure 8 This is a schematic diagram of the structure of the connection device when the heat exchange device of Example 2 of the utility model is in use;

[0050] Fig. 9 This is a schematic diagram of the structure of the connecting device when the heat exchange equipment of Example 2 of the utility model is not in use.

[0051] Description of reference numerals:

[0052] Heat exchange equipment 1000;

[0053] Connecting device 1;

[0054] Base 11;

[0055] Base body 111, base cover plate 112, first channel 113, communication port 114;

[0056] A first opening 121, a second opening 122, a third opening 123, a fourth opening 124, a fifth opening 125, and a sixth opening 126;

[0057] Membrane 13, second channel 131;

[0058] Valve core 14, first flange 141;

[0059] Elastic member 15;

[0060] Connecting member 16, second flange 161, groove 162;

[0061] Fluid system 2, inlet channel 21, outlet channel 22, heat exchange channel 23;

[0062] Heat exchanger 3;

[0063] Inlet end 41 and outlet end 42. DETAILED DESCRIPTION

[0064] The preferred embodiments are given below and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0065] It should be noted that: Figure 2 , Figure 8 The short straight line segment with an arrow in the middle indicates the direction of water flow;

[0066] Unless otherwise specified, the connection may be a detachable connection or a non-detachable connection; the detachable connection method includes but is not limited to threaded connection or snap connection, and the non-detachable connection method includes but is not limited to gluing, welding or riveting;

[0067] The methods of fixed connection include but are not limited to threaded connection, welding or adhesive connection.

[0068] Example 1

[0069] Figure 1-Figure 7 A schematic diagram of the structure provided for this embodiment.

[0070] like Figure 1 The heat exchange device 1000 provided in this embodiment includes a heat exchanger 3, a fluid system 2 and a connecting device 1. The fluid system 2 includes an inlet channel 21, a heat exchange channel 23 and an outlet channel 22 which are connected in sequence. The heat exchanger 3 is arranged at the heat exchange channel 23. Figure 2-Figure 6 , the connecting device 1 comprises:

[0071] A base 11 and an elastic membrane 13, wherein the base 11 defines a first opening 121, a first channel 113 and a communication port 114, the membrane 13 is disposed at the first opening 121 and defines a second channel 131 together with the base 11, the first channel 113 and the second channel 131 are communicated through the communication port 114, and both the first channel 113 and the second channel 131 are communicated with the outer side of the base 11;

[0072] A valve core 14, the valve core 14 is connected to the membrane 13, and the valve core 14 is used to close the communication port 114;

[0073] The elastic member 15 is used to abut the valve core 14 against the communication port 114;

[0074] The membrane 13 is configured so that when the internal pressure of the membrane 13 is greater than the external pressure, the membrane 13 is deformed in a direction away from the communication port 114 .

[0075] The heat exchange device 1000 provided in this embodiment is specifically a gas water heater, the inlet channel 21 of the fluid system 2 is a cold water inlet pipe, and the outlet channel 22 is a hot water outlet pipe; Figure 1 , Figure 2 The first channel 113 of the connecting device 1 is connected to the inlet channel 21 of the fluid system 2, corresponding to the inlet end 41 (i.e., the cold water inlet) of the gas water heater; the second channel 131 of the connecting device 1 is connected to the outlet channel 22 of the fluid system 2, corresponding to the outlet end 42 (i.e., the hot water outlet) of the gas water heater. The operation process of the gas water heater is as follows:

[0076] S1, such as Figure 2 When the user needs to use hot water, the water valve at the outlet end 42 is opened, and the water enters the heat exchange channel 23 from the inlet end 41 through the first channel 113 and the inlet channel 21 in sequence, and is heated into hot water by the heat exchanger 3 at the heat exchange channel 23, and then flows out through the delivery channel 22, the second channel 131, and the outlet end 42 in sequence. When the water valve is opened, the second channel 131 is connected to the external environment, so that the internal and external pressures of the membrane 13 are consistent, both of which are atmospheric pressure. At this time, the force of the membrane 13 on the valve core 14 is almost zero, and the valve core 14 abuts against the connecting port 114 under the action of the elastic member 15, isolating the first channel 113 and the second channel 131, and does not affect the normal use of hot water by the user.

[0077] S2, such as Figure 3 When the user stops using hot water and closes the water valve at the outlet end 42, the pipeline is in a closed state, the second channel 131 is isolated from the external environment, the pressure inside the membrane 13 (the inside, which is used to define one side of the second channel 131) becomes water pressure, and the pressure outside the membrane 13 (the outside) is atmospheric pressure, so that the pressure inside the membrane 13 is greater than the external pressure, and the membrane 13 deforms in the direction away from the connecting port 114. The force of the membrane 13 on the valve core 14 increases, so that the valve core 14 overcomes the force of the elastic member 15 to move away from and open the connecting port 114, so that the inlet channel 21, the heat exchange channel 23, the outlet channel 22, the second channel 131, and the first channel 113 are connected in sequence, and the cold water in the inlet channel 21 and the hot water in the heat exchange channel 23 and the outlet channel 22 can be mixed. At the same time, the force of the valve core 14 causes the elastic member 15 to deform.

[0078] S3. When the user opens the water valve again to use hot water within a short period of time (for example, within a few minutes), the pressure inside the membrane 13 drops instantaneously, and the pressure difference between the inside and the outside is almost zero, so that the force of the membrane 13 on the valve core 14 is almost zero, and the elastic member 15 is reset to make the valve core 14 abut against the connecting port 114, isolating the first channel 113 and the second channel 131, which does not affect the user's normal use of hot water. In S2, the cold water and the hot water are mixed, the temperature of the hot water is reduced, and the temperature of the cold water is increased, thereby improving the phenomenon of sandwich cold water and sandwich hot water.

[0079] The pressure difference between the inside and outside of the membrane 13 is changed by opening and closing the water valve, thereby realizing the automatic opening and closing of the connecting port 114, and further realizing the automatic switching of the connecting path. There is no need to set up an additional solenoid valve to change the connecting path, which is low-cost and easy to install.

[0080] In other embodiments, in order to adapt the space between the connecting device 1 and the heat exchange device 1000 , the second channel 131 may be connected to the inlet channel 21 , and the first channel 113 may be connected to the outlet channel 22 .

[0081] In this embodiment, the fluid is a water flow, the fluid system 2 is a water flow system, and the heat exchange device 1000 is a gas water heater. In other embodiments, the fluid may be a liquid or gaseous substance that can flow. When the fluid is in a liquid state, the heat exchange device 1000 may be a water heater or other device having a heat exchanger 3 and a heat exchange function; the water heater may be a gas water heater, an electric water heater, etc.; the electric water heater may be, for example, an electric water heater having a rapid heating function, and the heat exchanger 3 is used to heat the water flow in the rapid heating pipe. When the fluid is in a gaseous state, the heat exchange device 1000 may be a warm air device or other device having a heat exchanger 3 and a heat exchange function. In other embodiments, the connecting device 1 may also be used in other devices having a fluid system 2, and when the fluid system 2 stops being used, the fluid in the fluid system 2 is caused to flow to avoid deposition of substances in the fluid.

[0082] The material of the membrane 13 can be but not limited to elastic materials such as rubber or leather. Specifically, the membrane 13 is detachably connected to the first opening 121 of the base 11 by screws. On the one hand, it is convenient to place the valve core 14 into the base 11 from the first opening 121 to install the valve core 14, and it is also convenient to remove the membrane 13 and take out the valve core 14 from the first opening 121 for maintenance; on the other hand, it is convenient to regularly replace the membrane 13 so that the membrane 13 maintains good elasticity and improves the reliability of the connection device 1; on the third hand, it is convenient to replace the membrane 13 according to the specific application scenario so that the material, size, and elastic performance of the membrane 13 can meet specific usage requirements and improve the versatility of the connection device 1.

[0083] Specifically, the valve core 14 is connected to the middle of the diaphragm 13 by screws, which is convenient for increasing the maximum deformation amplitude of the diaphragm 13 and stabilizing the deformation direction of the diaphragm 13, thereby improving the reliability of the diaphragm 13 driving the valve core 14 to move to open the communication port 114.

[0084] like Figure 2 , Figure 4The valve core 14 is provided with a first flange 141, and the first flange 141 is used to close the communication port 114. The first flange 141 can increase the surface area to close the communication port 114, and improve the reliability of the valve core 14 closing the communication port 114. In other embodiments, a sealing member such as a rubber member can be provided on the first flange 141 to further improve the reliability of the first flange 141 closing the communication port 114.

[0085] In this embodiment, the elastic member 15 is specifically a coil spring, which has a simple structure and low cost.

[0086] like Figure 2 , Figure 3 The connection device 1 further includes a connection member 16, the valve core 14 is arranged in the second channel 131, the elastic member 15 and the connection member 16 are arranged in the first channel 113, the elastic member 15 is sleeved on the connection member 16, a part of the connection member 16 passes through the communication port 114 and is connected to the valve core 14, and the force between the valve core 14 and the elastic member 15 is transmitted through the connection member 16. With such a configuration, on the one hand, there is no need for the elastic member 15 and the valve core 14 to act directly, thereby reducing the structural and position requirements of the elastic member 15 and the valve core 14, making the structure of the connection device 1 simple; on the other hand, the elastic member 15 is sleeved on the connection member 16, which can not only prevent the elastic member 15 from falling off, but also the connection member 16 can play a guiding role for the elastic member 15, so that the force of the elastic member 15 is stable and reliable.

[0087] like Figure 4 , Figure 5 , a second flange 161 is provided at one end of the connecting member 16 away from the valve core 14, one end of the elastic member 15 in the extension direction abuts on the second flange 161, and the other end abuts on the connecting port 114 of the base 11. The second flange 161 is provided, on the one hand, to limit the end of the elastic member 15, and the limiting structure is simple and reliable; on the other hand, the surface area of ​​the end of the connecting member 16 can be increased to avoid damaging the base 11 when the connecting member 16 abuts against the wall of the first channel 113 of the base 11. Furthermore, a groove 162 is provided on the second flange 161, and one end of the elastic member 15 abuts in the groove 162 of the second flange 161, which can further improve the reliability of the installation of the elastic member 15. In other embodiments, the shape of the connecting member 16 can be changed to prevent the elastic member 15 from falling off, for example, the connecting member 16 is set to be conical, in which case the second flange 161 may not be provided.

[0088] The two ends of the elastic member 15 are abutted against each other, which is simple to install and convenient to remove the elastic member 15 for maintenance or replacement. In other embodiments, one end of the elastic member 15 can be fixed to the second flange 161, and the other end can be fixed to the connecting port 114 of the base 11, which can further prevent the elastic member 15 from falling off or tilting, and further improve the reliability of the installation of the elastic member 15 and the stability of the force transmission.

[0089] like Figure 6 , Figure 7 The base 11 includes a base body 111 and a base cover 112. The base body 111 is defined with a second opening 122. The base cover 112 covers the second opening 122. The base cover 112 and the base body 111 jointly define a first channel 113. The elastic member 15 and the connecting member 16 are provided at the base cover 112. The base cover 112 is provided to facilitate opening the base cover 112 and installing and maintaining the elastic member 15 and the connecting member 16 from the second opening 122. Specifically, the base cover 112 is fixed to the second opening 122 of the base body 111 by screws, and a sealing member is provided between the base cover 112 and the base body 111 to prevent water leakage.

[0090] like Figure 6 The base 11 further defines a third opening 123, a fourth opening 124, a fifth opening 125 and a sixth opening 126. The third opening 123 and the fourth opening 124 correspond to the two ends of the flow path of the first channel 113, and the fifth opening 125 and the sixth opening 126 correspond to the two ends of the flow path of the second channel 131. Figure 1 , Figure 2 , Figure 6 The first channel 113 is connected to the inlet end 41 through the third opening 123, and is connected to the entry channel 21 through the fourth opening 124; the second channel 113 is connected to the delivery channel 22 through the fifth opening 125, and is connected to the outlet end 42 through the sixth opening 126. The third opening 123, the fourth opening 124, the fifth opening 125 and the sixth opening 126 are provided. On the one hand, the sealing performance of the connection device 1 to the valve core 14, the elastic member 15 and the connection member 16 inside the base 11 can be improved, and the internal structure of the base 11 can be avoided from being damaged during the transportation or installation of the connection device 1; on the other hand, it is convenient for the first channel 113 and the second channel 131 to be connected to the channel in the fluid system 2; on the third hand, by setting the size standards of the third opening 123, the fourth opening 124, the fifth opening 125 and the sixth opening 126, it is also convenient to achieve standardization of the connection device 1.

[0091] In other embodiments, the shape of the base 11 can be flexibly adjusted so that the connecting device 1 can better adapt to the heat exchange device 1000 of a specific application.

[0092] Example 2

[0093] Figure 8 , Fig. 9 This is a structural diagram of the present embodiment. The present embodiment provides a connecting device 1, in which the structure and connection relationship of the base 11, the membrane 13, and the valve core 14 of the connecting device 1 are the same as those of the embodiment 1, and the specifics can be referred to the embodiment 1; the difference mainly lies in the arrangement of the elastic member 15.

[0094] like Figure 8 , Fig. 9 The elastic member 15 is arranged in the second channel 131, so that the structure of the connecting device 1 is compact. Furthermore, the elastic member 15 is sleeved on the valve core 14, which can not only prevent the elastic member 15 from falling off, but also the valve core 14 can guide the elastic member 15, which makes the structure of the connecting device 1 compact on the one hand and the force of the elastic member 15 stable and reliable on the other hand.

[0095] like Fig. 9 One end of the elastic member 15 in the extension direction abuts against the first flange 141, and the other end abuts against the first opening 121 of the base 11. The first flange 141 limits the end of the elastic member 15, and the limiting structure is simple and reliable.

[0096] The two ends of the elastic member 15 are abutted, which is easy to install and convenient to remove for maintenance or replacement. In other embodiments, one end of the elastic member 15 can be fixed to the first flange 141 and the other end can be fixed to the first opening 121 of the base 11.

[0097] In other embodiments, the shape of the valve core 14 may be changed to prevent the elastic member 15 from falling off, for example, the valve core 14 may be configured to be conical.

[0098] Compared with Example 1, the connecting member 16 is not provided in this embodiment, so that the structure of the connecting device 1 is simple; in this embodiment, the elastic member 15 and the valve core 14 are both arranged in the second channel 131, and the components do not need to be arranged in the first channel 113, so that the size of the first channel 113 can be flexibly adjusted according to actual needs. For example, the first channel 113 can be adjusted to be smaller to make the structure of the connecting device 1 compact; in this embodiment, the elastic member 15 is directly sleeved on the valve core 14, and the elastic member 15 and the valve core 14 are in direct contact to transmit the force, so that the force transmission is efficient and reliable.

[0099] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A connection device for a fluid system, characterized in that: It includes: A base and an elastic membrane, wherein the base is defined with a first opening, a first channel and a communication port, the membrane is disposed at the first opening and defines a second channel together with the base, the first channel and the second channel are communicated through the communication port, and the first channel and the second channel are both communicated with the outer side of the base; A valve core, the valve core is connected to the membrane, and the valve core is used to close the communication port; An elastic member, used for abutting the valve core against the communication port; The membrane and the valve core are arranged such that when the internal pressure of the membrane is greater than the external pressure, the membrane is deformed in a direction away from the communication port.

2. The connecting device for a fluid system according to claim 1, characterized in that: The valve core and the elastic member are arranged in the second passage, and the elastic member is sleeved on the valve core.

3. The connecting device for a fluid system according to claim 2, characterized in that: The valve core is provided with a first flange, which is used to close the communication port. One end of the elastic member in the expansion and contraction direction abuts or is fixedly connected to the first flange, and the other end abuts or is fixedly connected to the first opening of the base.

4. The connecting device for a fluid system according to claim 1, characterized in that: The valve core is arranged in the second passage, and the elastic member is arranged in the first passage.

5. The connection device for a fluid system according to claim 4, characterized in that: The connecting device further comprises a connecting piece arranged in the first passage, the elastic piece is sleeved on the connecting piece, and a part of one of the valve core and the connecting piece passes through the communication port to be connected to the other one.

6. The connecting device for a fluid system according to claim 5, characterized in that: A second flange is provided at one end of the connecting member away from the valve core, one end of the elastic member in the expansion and contraction direction abuts against or is fixedly connected to the second flange, and the other end abuts against or is fixedly connected to the communication port of the base; And / or, the base includes a base body and a base cover, the base cover is covered at the second opening of the base body and defines the first channel together with the base body, and the elastic member and the connecting member are arranged at the base cover.

7. The connecting device for a fluid system according to claim 1, characterized in that: The membrane is detachably connected to the first opening; And / or, the valve core is connected to the middle part of the membrane.

8. The connecting device for a fluid system according to claim 1, characterized in that: The valve core is provided with a first flange, and the first flange is used to close the communication port; And / or, the valve core and the membrane are fixedly connected.

9. The connecting device for a fluid system according to claim 1, characterized in that: The base is further defined with a third opening and a fourth opening, and both ends of the first channel flow path are connected to the outside of the base through the third opening and the fourth opening; The base further defines a fifth opening and a sixth opening, and both ends of the second channel flow path communicate with the outside of the base through the fifth opening and the sixth opening.

10. A heat exchange device, comprising a heat exchanger and a fluid system, wherein the fluid system comprises an inlet channel, a heat exchange channel and an outlet channel connected in sequence, the heat exchanger is arranged at the heat exchange channel, and is characterized in that: The heat exchange device further comprises a connecting device for a fluid system according to any one of claims 1 to 9, wherein one of the first channel and the second channel is connected to the inlet channel, and the other is connected to the outlet channel.

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