Zero cold water system
By designing a central heating circuit, domestic water circuit and inter-circuit heat exchanger in a zero-cooled water system, effective heat recovery and simultaneous operation of multiple loops are achieved, and the shortcomings in the existing system in terms of heat exchange capacity and operation efficiency are solved. , improves the overall thermal efficiency and user experience of the system.
Patent Information
- Application Number
- CN202421002437.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-09
AI Technical Summary
The existing zero-cooled water system has shortcomings in improving heat exchange capacity and operating efficiency, especially when heating demand is strong in winter, it cannot operate simultaneously, and consumes more fuel and generates more heat emissions.
A zero-cooled water system is designed, including a central heating circuit, a domestic water circuit and an inter-circuit heat exchanger, by providing the first and second flue gas heat exchangers in the exhaust passage and performing heat at the inter-circuit heat exchanger. Exchange to achieve effective heat recovery and simultaneous operation of multiple loops.
It improves the heat exchange capacity and operating efficiency of the entire zero-cold water system, reduces fuel consumption and heat emissions, and can operate heating and domestic water circuits simultaneously in winter, improving the user experience.
Smart Images
Figure CN222438030U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of water supply device structure, and more specifically, to a zero cooling water system, which aims to improve heat exchange capacity and operation efficiency. Background Art
[0002] In conventional domestic water supply, domestic water is usually supplied through an independent circuit. Domestic water supply can adopt a zero-chilled water system, which keeps the water in the supply water circuit at a desired temperature so that household users can directly get hot water when they turn on the water device. Therefore, the zero-chilled water system consumes more fuel and generates more heat emissions. In addition, the domestic water circuit and the central heating circuit usually cannot be heated at the same time, which is disadvantageous during the winter when the heating demand is strong. Utility Model Content
[0003] One aspect of the present application is to provide a zero-chilled-water system that can more effectively recover flue gas heat and allow multiple circuits to operate simultaneously.
[0004] The purpose of this application is achieved through the following technical solutions:
[0005] A zero cooling water system, comprising:
[0006] a central heating circuit comprising a first flue gas heat exchanger;
[0007] a domestic water circuit including a second flue gas heat exchanger; and
[0008] an inter-circuit heat exchanger, wherein the central heating circuit selectively exchanges heat with the domestic water circuit at the inter-circuit heat exchanger through the second branch;
[0009] Wherein, both the first flue gas heat exchanger and the second flue gas heat exchanger are arranged in the exhaust duct and perform heat exchange with the flue gas.
[0010] In the above zero cooling water system, optionally, in the traveling direction of the flue gas in the exhaust duct, the first flue gas heat exchanger is arranged upstream of the second flue gas heat exchanger.
[0011] In the above zero cooling water system, optionally, the domestic water loop further includes a second pump, and the second pump is arranged upstream of the second flue gas heat exchanger.
[0012] In the above zero cooling water system, optionally, the domestic water circuit further includes a pressure reducing valve, and the pressure reducing valve is arranged between the second flue gas heat exchanger and the second pump.
[0013] In the above zero cooling water system, optionally, the second flue gas heat exchanger is arranged upstream of the inter-circuit heat exchanger, and the domestic water circuit extends through the inter-circuit heat exchanger.
[0014] In the above-mentioned zero cooling water system, optionally, the central heating circuit also includes a second branch, the first branch and the second branch are arranged in parallel, the first flue gas heat exchanger is arranged in the first branch, and the second branch extends through the inter-circuit heat exchanger, wherein the downstream ends of the first branch and the second branch are connected through a switching valve.
[0015] In the above zero cooling water system, optionally, the central heating circuit further includes a first pump, which is arranged in the first branch and upstream of the first flue gas heat exchanger.
[0016] In the above zero cooling water system, optionally, the domestic water loop further includes an expansion water tank, and the expansion water tank is arranged downstream of the second flue gas heat exchanger.
[0017] In the above zero cold water system, optionally, the central heating loop is connected to one or more heating devices, and the domestic water loop is connected to one or more shower heads and / or faucets.
[0018] In the above zero cooling water system, optionally, it further includes:
[0019] an exhaust duct accommodating a first flue gas heat exchanger and a second flue gas heat exchanger; and
[0020] A burner is connected to the exhaust duct and discharges flue gas to the exhaust duct. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The present application will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments. Those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present application. In addition, unless otherwise specified, the drawings are intended only to conceptually represent the composition or structure of the described objects and may contain exaggerated displays. The drawings are not necessarily drawn to scale.
[0022] Figure 1 It is a schematic diagram of an embodiment of the zero cooling water system of the present application. DETAILED DESCRIPTION
[0023] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present application.
[0024] First, it should be noted that the top, bottom, upward, downward, and other directional terms mentioned in this article are defined relative to the directions in the various drawings. These directions are relative concepts and will therefore vary depending on the position and state they are in. Therefore, these or other directional terms should not be understood as restrictive.
[0025] In addition, it should be pointed out that for any single technical feature described or implied in the embodiments of this document or any single technical feature shown or implied in the accompanying drawings, these technical features (or their equivalents) can be further combined to obtain other embodiments not directly mentioned in this document.
[0026] It should be noted that in different drawings, the same reference numerals denote the same or substantially the same components.
[0027] Figure 1 An embodiment of the zero cooling water system of the present application is shown. In the illustrated embodiment, the zero cooling water system 10 may include: a central heating circuit 100, a domestic water circuit 200, an inter-circuit heat exchanger 300, an exhaust duct 400, a burner 500, etc. In the illustrated embodiment, the central heating circuit 100 and the domestic water circuit 200 are independent circuits. The flow directions of the working fluid or water in the central heating circuit 100 and the domestic water circuit 200 are indicated by arrows A1 of a first style and arrows A2 of a second style, respectively.
[0028] The central heating circuit 100 may be connected to one or more heating devices 150. In one embodiment, the heating device 150 may be a floor heating device or a radiator, etc., so as to provide heating for the house, especially in winter or when the temperature is low. The central heating circuit may further extend to the first branch 101, and may further include a second branch 102. In one embodiment, the central heating circuit may start from the heating device 150 and extend to the second branch 102. Figure 1The first branch 101 in the central heating circuit 100 is located at the position, and extends through the first flue gas heat exchanger 110, and then returns to the heating device 150, thereby forming the entire circulation structure. In one embodiment, the second branch 102 may be an auxiliary structure added to the central heating circuit 100. In one embodiment, the first branch 101 and the second branch 102 may be arranged in parallel, or in other words, arranged in a parallel style. The first flue gas heat exchanger 110 and the first pump 120 may be arranged in the first branch 101. The first pump 120 may be arranged upstream of the first flue gas heat exchanger 110 and play a role in pumping working fluid or water. The second branch 102 may extend through the inter-circuit heat exchanger 300. The downstream ends of the first branch 101 and the second branch 102 may be connected through the switching valve 130. In one embodiment, the switching valve 130 may have different working states to change the connection state of the first branch 101 and the second branch 102. In one embodiment, the switching valve 130 may be a three-way valve.
[0029] The domestic water loop 200 may include a second flue gas heat exchanger 210, a second pump 220, a pressure reducing valve 230, an expansion water tank 240, etc. In the illustrated embodiment, the second pump 220, the pressure reducing valve 230, the second flue gas heat exchanger 210 and the expansion water tank 240 are arranged sequentially from upstream to downstream. In one embodiment, a first check valve 261 may also be arranged downstream of the second pump 220. In one embodiment, a flow sensor 270 and a second check valve 262 may be connected in a branch and arranged in parallel with the second pump 220 and the first check valve 261. The second pump 220 may function to pump a working fluid or water.
[0030] The second flue gas heat exchanger 210 may be arranged in the exhaust duct 400 and preheat the working fluid or water. It should be noted that in addition to preheating by the second flue gas heat exchanger 210, the working fluid or water in the domestic water loop 200 may also be heated by other methods or devices known in the art. The second flue gas heat exchanger 210 provided in the present application is intended to at least partially recover the heat carried by the flue gas in the exhaust duct 400, thereby improving the overall thermal efficiency. For the sake of clarity, Figure 1 Some components of the zero cooling water device are omitted, but this does not mean that these components do not exist. Those skilled in the art can add and connect these components based on general knowledge in the art.
[0031] The pressure reducing valve 230 can reduce the pressure of the working fluid or water in the domestic water loop 200. In particular, the pressure reducing valve 230 can reduce the pressure of the working fluid or water entering the second flue gas heat exchanger 210. Other pressure reducing valves can also be provided in the domestic water loop 200. For example, in the illustrated embodiment, the optional pressure reducing valve 280 can be arranged downstream of the expansion water tank 240.
[0032] The expansion water tank 240 may be arranged downstream of the second flue gas heat exchanger 210. In the illustrated embodiment, the expansion water tank 240 may be arranged downstream of the inter-circuit heat exchanger 300. The expansion water tank 240 may provide a certain storage space to store a portion of the working fluid or water, and reduce the water pressure shock caused by the upstream pressure and flow changes, thereby reducing the cold water sandwich phenomenon. In one embodiment, the expansion water tank 240 may be connected in series in the domestic water circuit 200.
[0033] The domestic water loop 200 may also be coupled to one or more water-using devices. For example, the domestic water loop 200 may be coupled to one or more shower heads 251 and / or one or more faucets 252. In one embodiment, the one or more shower heads 251 and / or one or more faucets 252 may be arranged downstream of the expansion water tank 240.
[0034] The inter-circuit heat exchanger 300 may be arranged between the second flue gas heat exchanger 210 and the expansion water tank 240, and the domestic water circuit 200 may extend through the inter-circuit heat exchanger 300. The function of the inter-circuit heat exchanger 300 is to perform heat exchange and / or heat transfer between different circuits. The central heating circuit 100 may be attached to the second branch 102, and the second branch 102 may extend through the inter-circuit heat exchanger 300. In one embodiment, the inter-circuit heat exchanger 300 may be a plate heat exchanger (Plate Heat Exchanger, abbreviated as PHE). The inter-circuit heat exchanger 300 may perform heat exchange between the central heating circuit 100 and the domestic water circuit 200, thereby further recovering heat and improving the overall thermal efficiency.
[0035] By changing the connection mode of the switching valve 130, the water supply system of the present application can provide different working states. For example, the first branch 101 can be connected and the second branch 102 can be closed and disabled, and the central heating circuit 100 and the domestic water circuit 200 can be operated independently and will not interfere with each other's operation. For another example, the first branch 101 and the second branch 102 can be connected to form a closed loop, thereby providing a small circulation of the working fluid inside the first branch 101 and the second branch 102, so that the working fluid from the first flue gas heat exchanger 110 can provide heat to the domestic water circuit 200 through the inter-circuit heat exchanger 300, further improving the thermal efficiency.
[0036] The burner 500 is connected to the exhaust duct 400 and can discharge flue gas through the exhaust duct 400. In one embodiment, the burner 500, the exhaust duct 400, the first flue gas heat exchanger 110 and the second flue gas heat exchanger 210 together constitute a condensing furnace. Figure 1In the embodiment shown, the burner 500 is arranged below the exhaust duct 400, and the flue gas travels in the direction indicated by the dashed arrow A3. The direction indicated by the arrow A3 is the direction in which the flue gas travels. Figure 1 As shown, the first flue gas heat exchanger 110 and the second flue gas heat exchanger 210 can be arranged in the exhaust duct 400 and perform heat exchange with the flue gas. In the illustrated embodiment, in the direction A3 of the flue gas travel in the exhaust duct 400, the first flue gas heat exchanger 110 and the second flue gas heat exchanger 210 are arranged in sequence, and the first flue gas heat exchanger 110 can be arranged upstream of the second flue gas heat exchanger 210. In the illustrated embodiment, the direction of combustion can be from bottom to top, that is, the direction of arrow A3. In an embodiment not shown, the direction of combustion can be from top to bottom, that is, the opposite direction of arrow A3. The arrangement of components of such alternative embodiments can be changed according to actual needs.
[0037] In this way, the heat in the flue gas discharged by the burner 500 can be used to exchange heat with the working fluid or water in the first flue gas heat exchanger 110 and the second flue gas heat exchanger 210, and heat the water, thereby providing heat for the central heating loop 100 and the domestic water loop 200 of the zero cooling water system 10. The arrangement of the first flue gas heat exchanger 110 and the second flue gas heat exchanger 210 of the present application can more effectively recover the heat in the flue gas, thereby improving the thermal efficiency of the entire zero cooling water system. In addition, the temperature of the flue gas discharged by the condensing furnace is relatively low, for example, about 80°C. Such relatively low flue gas temperature can be effectively recovered by the flue gas heat exchanger of the present application, and the potential adverse effects of excessively high flue gas temperatures on the heat exchanger are avoided.
[0038] The zero cooling water system of the present application may have different operation modes. For example, in the heating season or in a period when the temperature is relatively cold, the central heating circuit 100 of the zero cooling water system 10 is usually in operation so as to heat the room through the heating device 150. In this case, the domestic water circuit 200 may be in a suspended state. When the user needs to heat domestic water, the central heating circuit 100 may be suspended, and the domestic water circuit 200 may be put into operation. For another example, in the non-heating season or in a period when the temperature is relatively warm, the central heating circuit 100 of the zero cooling water system 10 is usually in a suspended state, and the domestic water circuit 200 is in operation, so as to supply hot domestic water in real time.
[0039] The zero cooling water system of the present application has the advantages of being simple and reliable, easy to implement, and convenient to use, and can improve the thermal efficiency of the entire water supply process and improve the user experience.
[0040] This specification discloses the present application with reference to the accompanying drawings, and also enables those skilled in the art to implement the present application, including making and using any device or system, selecting suitable materials, and using any combined method. The scope of the present application is defined by the technical solution for protection, and includes other examples that occur to those skilled in the art. As long as such other examples include structural elements that are not different from the literal language of the technical solution for protection, or such other examples include equivalent structural elements that are not substantially different from the literal language of the technical solution for protection, such other examples should be deemed to be within the scope of protection determined by the technical solution for protection of the present application.
Claims
1. A zero cooling water system, characterized in that: include: A central heating circuit (100) comprising a first flue gas heat exchanger (110); A domestic water circuit (200) comprising a second flue gas heat exchanger (210); as well as an inter-circuit heat exchanger (300), wherein the central heating circuit (100) selectively exchanges heat with the domestic water circuit (200) at the inter-circuit heat exchanger (300) via a second branch (102); Wherein, both the first flue gas heat exchanger (110) and the second flue gas heat exchanger (210) are arranged in the exhaust duct (400) and perform heat exchange with the flue gas.
2. The zero cooling water system according to claim 1, characterized in that: In the flue gas travelling direction (A3) in the exhaust duct (400), the first flue gas heat exchanger (110) is arranged upstream of the second flue gas heat exchanger (210).
3. The zero cooling water system according to claim 1, characterized in that: The domestic water circuit (200) further comprises a second pump (220), wherein the second pump (220) is arranged upstream of the second flue gas heat exchanger (210).
4. The zero cooling water system according to claim 3, characterized in that: The domestic water circuit (200) further comprises a pressure reducing valve (230), wherein the pressure reducing valve (230) is arranged between the second flue gas heat exchanger (210) and the second pump (220).
5. The zero cooling water system according to claim 1, characterized in that: The second flue gas heat exchanger (210) is arranged upstream of the inter-circuit heat exchanger (300), and the domestic water circuit (200) extends through the inter-circuit heat exchanger (300).
6. The zero cooling water system according to claim 1, characterized in that: The central heating circuit (100) further comprises a first branch (101), wherein the first branch (101) and the second branch (102) are arranged in parallel, the first flue gas heat exchanger (110) is arranged in the first branch (101), and the second branch (102) extends through the inter-circuit heat exchanger (300), wherein the downstream ends of the first branch (101) and the second branch (102) are connected via a switching valve (130).
7. The zero cooling water system according to claim 6, characterized in that: The central heating circuit (100) further comprises a first pump (120), wherein the first pump (120) is arranged in the first branch (101) and upstream of the first flue gas heat exchanger (110).
8. The zero cooling water system according to any one of claims 1 to 7, characterized in that: The domestic water circuit (200) further comprises an expansion water tank (240), wherein the expansion water tank (240) is arranged downstream of the second flue gas heat exchanger (210).
9. The zero cooling water system according to any one of claims 1 to 7, characterized in that: The central heating circuit (100) is connected to one or more heating devices (150), and the domestic water circuit (200) is connected to one or more shower heads (251) and / or faucets (252).
10. The zero cooling water system according to any one of claims 1 to 7, characterized in that: Also includes: an exhaust duct (400) accommodating the first flue gas heat exchanger (110) and the second flue gas heat exchanger (210); as well as A burner (500) is connected to the exhaust duct (400) and discharges flue gas to the exhaust duct (400).