Refrigeration-hot water system

Abstract

The utility model provides a refrigeration-hot water system which comprises a refrigeration system and a hot water system, the refrigeration system comprises a first compressor, a first heat exchanger and a second heat exchanger, and the hot water system comprises a second compressor, a third heat exchanger and a fourth heat exchanger; a refrigerant outlet of the first compressor is connected with a refrigerant inlet of the first heat exchanger, a refrigerant outlet of the first heat exchanger is connected with a refrigerant inlet of the second heat exchanger, and a refrigerant outlet of the second heat exchanger is connected with a refrigerant inlet of the first compressor. A refrigerant outlet of the second compressor is connected with a refrigerant inlet of the third heat exchanger, a refrigerant outlet of the third heat exchanger is connected with a refrigerant inlet of the fourth heat exchanger, and a refrigerant outlet of the fourth heat exchanger is connected with a refrigerant inlet of the second compressor; a water inlet of the first heat exchanger is connected with a living water source. A water outlet of the first heat exchanger is connected with a water inlet of the third heat exchanger.

Description

Technical Field

[0001] The present application belongs to the field of waste heat recovery technology, and in particular relates to a cooling-hot water system. Background Art

[0002] When the air conditioner is cooling, the air blown out by the outdoor unit of the air conditioner is at a high temperature, but it is difficult to use. How to make use of this energy has become an urgent problem that needs to be solved. Utility Model Content

[0003] The embodiment of the present application provides a cooling-hot water system to solve the problem that the excess heat of the existing cooling system is difficult to utilize.

[0004] In a first aspect, an embodiment of the present application provides a cooling-hot water system, which includes a cooling system and a hot water system, the cooling system including a first compressor, a first heat exchanger and a first heat exchanger, and the hot water system including a second compressor, a third heat exchanger and a fourth heat exchanger; the refrigerant outlet of the first compressor is connected to the refrigerant inlet of the first heat exchanger, the refrigerant outlet of the first heat exchanger is connected to the refrigerant inlet of the second heat exchanger, and the refrigerant outlet of the second heat exchanger is connected to the refrigerant inlet of the first compressor; the refrigerant outlet of the second compressor is connected to the refrigerant inlet of the third heat exchanger, the refrigerant outlet of the third heat exchanger is connected to the refrigerant inlet of the fourth heat exchanger, and the refrigerant outlet of the fourth heat exchanger is connected to the refrigerant inlet of the second compressor; the water inlet of the first heat exchanger is connected to a domestic water source, and the water outlet of the first heat exchanger is connected to the water inlet of the third heat exchanger.

[0005] Optionally, the first heat exchanger includes a first refrigerant pipe, a first water pipe and a first heat exchange cavity for accommodating a heat exchange medium, and the first refrigerant pipe and the first water pipe are both arranged in the heat exchange cavity; the refrigerant inlet of the first refrigerant pipe is connected to the refrigerant outlet of the first compressor, the refrigerant outlet of the first refrigerant pipe is connected to the refrigerant inlet of the second heat exchanger, the water inlet of the first water pipe is connected to the domestic water source, and the water outlet of the first water pipe is connected to the water inlet of the third heat exchanger.

[0006] Optionally, the fourth heat exchanger includes a second refrigerant pipe and a second heat exchange chamber for accommodating a heat exchange medium, the second refrigerant pipe is arranged in the second heat exchange chamber, the refrigerant inlet of the second refrigerant pipe is connected to the refrigerant outlet of the third heat exchanger, and the refrigerant outlet of the second refrigerant pipe is connected to the refrigerant inlet of the second compressor.

[0007] Optionally, the outlet of the first heat exchange chamber is connected to the inlet of the second heat exchange chamber through a first pipe, and the outlet of the second heat exchange chamber is connected to the inlet of the first heat exchange chamber through a second pipe.

[0008] Optionally, a discharge pipe communicating with the first heat exchange chamber is provided on the first heat exchanger, and a valve for opening and closing the discharge pipe is provided on the discharge pipe.

[0009] Optionally, the heat exchange medium is tap water, and the refrigeration system further includes a third water pipe and a first water pump. The water inlet of the third water pipe is connected to a tap water source, the water outlet of the third water pipe is connected to the water inlet end of the first water pump, and the water outlet end of the first water pump communicates with the first heat exchange chamber.

[0010] Optionally, the refrigeration system further includes a fourth water pipe and a second water pump. The water inlet of the fourth water pipe is connected to a domestic water source, the water outlet of the fourth water pipe is connected to the water inlet end of the second water pump, and the water outlet end of the second water pump communicates with the first heat exchange chamber.

[0011] Optionally, the hot water system further includes a water storage tank, and the water inlet of the water storage tank is connected to the water outlet of the third heat exchanger.

[0012] Optionally, a first throttling element is connected between the refrigerant inlet of the second heat exchanger and the refrigerant outlet of the first heat exchanger.

[0013] Optionally, a second throttling element is connected between the refrigerant outlet of the third heat exchanger and the refrigerant inlet of the fourth heat exchanger.

[0014] The refrigeration-hot water system provided by the embodiment of the present application forms a circulation loop by connecting the first compressor, the first heat exchanger and the second heat exchanger of the refrigeration system in sequence, and forms a circulation loop by connecting the second compressor, the third heat exchanger and the fourth heat exchanger of the hot water system in sequence. The water inlet of the first heat exchanger is connected to a domestic water source, and the water outlet of the first heat exchanger is connected to the water inlet of the third heat exchanger. Thus, the domestic water can be preheated by using the refrigerant heat in the first heat exchanger, and then the preheated domestic water flows into the third heat exchanger, thereby realizing heating the water of the hot water system by using the waste heat of the refrigeration system, reducing the system energy consumption and improving the energy efficiency. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings. Among them, the same reference numerals represent the same parts in the following description.

[0016] Figure 1 It is a schematic structural diagram of the refrigeration-hot water system provided by the embodiment of the present application.

[0017] Explanation of the Reference Numerals in the Drawings

[0018] 100, Refrigeration system; 110, First compressor; 120, First heat exchanger; 130, Second heat exchanger; 140, Discharge pipe; 150, Valve; 161, Third water pipe; 162, First water pump; 163, First filter; 171, Fourth water pipe; 172, Second water pump; 173, Second filter; 180, First throttling element; 200, Hot water system; 210, Second compressor; 220, Third heat exchanger; 230, Fourth heat exchanger; 240, Water storage tank; 250, Second throttling element. Specific embodiments

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0020] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.

[0021] In the present application, the term "exemplary" is used to mean "serving as an example, illustration, or explanation". Any embodiment described as "exemplary" in the present application is not necessarily construed as being more preferred or more advantageous than other embodiments.

[0022] The embodiments of the present application provide a refrigeration-hot water system, as Figure 1As shown in the figure, the refrigeration-hot water system includes a refrigeration system 100 and a hot water system 200. The refrigeration system 100 includes a first compressor 110, a first heat exchanger 120, and a second heat exchanger 130. The hot water system 200 includes a second compressor 210, a third heat exchanger 220, and a fourth heat exchanger 230. The refrigerant outlet of the first compressor 110 is connected to the refrigerant inlet of the first heat exchanger 120. The refrigerant outlet of the first heat exchanger is connected to the refrigerant inlet of the second heat exchanger 130. The refrigerant outlet of the second heat exchanger 130 is connected to the refrigerant inlet of the first compressor 110. The refrigerant outlet of the second compressor 210 is connected to the refrigerant inlet of the third heat exchanger 220. The refrigerant outlet of the third heat exchanger 220 is connected to the refrigerant inlet of the fourth heat exchanger 230. The refrigerant outlet of the fourth heat exchanger 230 is connected to the refrigerant inlet of the second compressor 210. The water inlet of the first heat exchanger 120 is connected to the domestic water source. The water outlet of the first heat exchanger 120 is connected to the water inlet of the third heat exchanger 220.

[0023] In the refrigeration-hot water system provided by the embodiment of the present application, by connecting the first compressor 110, the first heat exchanger 120, and the second heat exchanger 130 of the refrigeration system 100 in sequence to form a circulation loop, and connecting the second compressor 210, the third heat exchanger 220, and the fourth heat exchanger 230 of the hot water system 200 in sequence to form a circulation loop, and connecting the water inlet of the first heat exchanger 120 to the domestic water source and the water outlet of the first heat exchanger 120 to the water inlet of the third heat exchanger 220, the domestic water can be preheated by using the refrigerant heat in the first heat exchanger 120, and then the preheated domestic water flows into the third heat exchanger 220, thereby realizing heating the water of the hot water system 200 by using the waste heat of the refrigeration system 100, reducing the system energy consumption and improving the energy efficiency, and promoting cost reduction, efficiency increase, energy conservation and emission reduction.

[0024] Specifically, when the refrigeration system 100 operates, the refrigerant of the refrigeration system 100 exchanges heat with the heat exchange medium in the first heat exchanger 120, so that the temperature of the heat exchange medium rises and the temperature of the refrigerant of the refrigeration system 100 drops. At the same time, the heat exchange medium with the increased temperature enters the fourth heat exchanger 230 of the hot water system 200 and exchanges heat with the refrigerant of the hot water system 200 in the fourth heat exchanger 230, so that the temperature of the heat exchange medium drops and the temperature of the refrigerant of the refrigeration system 100 rises, ensuring that the refrigerant of the hot water system 200 has sufficient superheat when returning to the second compressor 210. In addition, before the domestic water enters the third heat exchanger 220 of the hot water system 200, it is preheated in the first heat exchanger 120 of the refrigeration system 100. If the user's requirement for the hot water temperature is not high, it can be directly used after preheating. If the user requires a higher hot water temperature or the preheated water is in short supply, it is reheated by the third heat exchanger 220 of the hot water system 200.

[0025] In some embodiments of the present application, the first heat exchanger 120 includes a first refrigerant pipe for circulating refrigerant, a first water pipe for circulating domestic water, and a first heat exchange chamber for accommodating a heat exchange medium. The first refrigerant pipe and the first water pipe are both disposed through the heat exchange chamber. The refrigerant inlet of the first refrigerant pipe is connected to the refrigerant outlet of the first compressor 110, the refrigerant outlet of the first refrigerant pipe is connected to the refrigerant inlet of the second heat exchanger 130, the water inlet of the first water pipe is connected to a domestic water source, and the water outlet of the first water pipe is connected to the water inlet of the third heat exchanger 220. Specifically, the refrigerant in the first refrigerant pipe exchanges heat with the domestic water in the first water pipe through the heat exchange medium in the first heat exchange chamber, that is, the heat of the refrigerant in the first refrigerant pipe is transferred to the domestic water in the first water pipe through the heat exchange medium in the first heat exchange chamber to heat the domestic water in the first water pipe and raise the temperature of the domestic water in the first water pipe.

[0026] Optionally, the fourth heat exchanger 230 includes a second refrigerant pipe for circulating refrigerant and a second heat exchange chamber for accommodating a heat exchange medium. The second refrigerant pipe is disposed through the second heat exchange chamber. The refrigerant inlet of the second refrigerant pipe is connected to the refrigerant outlet of the third heat exchanger 220, and the refrigerant outlet of the second refrigerant pipe is connected to the refrigerant inlet of the second compressor 210. Specifically, the refrigerant in the second refrigerant pipe exchanges heat with the heat exchange medium in the second heat exchange chamber, that is, the cold of the refrigerant in the second refrigerant pipe is transferred to the heat exchange medium in the second heat exchange chamber to raise the temperature of the refrigerant in the second refrigerant pipe, so as to ensure that the refrigerant in the second refrigerant pipe has sufficient superheat when returning to the second compressor 210, thereby reducing the work energy consumption of the second compressor 210.

[0027] Optionally, the outlet of the first heat exchange chamber is connected to the inlet of the second heat exchange chamber through a first pipe, and the outlet of the second heat exchange chamber is connected to the inlet of the first heat exchange chamber through a second pipe. With such a setting, the heat exchange medium can circulate between the first heat exchange chamber and the second heat exchange chamber. Thus, the heated heat exchange medium in the first heat exchange chamber can flow into the second heat exchange chamber to exchange heat with the refrigerant in the second refrigerant pipe to raise the temperature of the refrigerant in the second refrigerant pipe. At the same time, the residual cold of the refrigerant in the second refrigerant pipe can be used to cool the heat exchange medium in the second heat exchange chamber, and the cooled heat exchange medium flows back into the first heat exchange chamber, achieving the effect of making full use of the residual cold of the hot water system 200.

[0028] In some embodiments of the present application, a discharge pipe 140 communicating with the first heat exchange chamber is provided on the first heat exchanger 120, and a valve 150 for opening and closing the discharge pipe 140 is provided on the discharge pipe 140. By providing the above discharge pipe 140 and valve 150, the valve 150 can be opened to discharge the heat exchange medium in the first heat exchange chamber from the discharge pipe 140, and then new heat exchange medium can be replaced into the first heat exchange chamber.

[0029] In some embodiments of the present application, the heat exchange medium is tap water. The refrigeration system 100 further includes a third water pipe 161 and a first water pump 162. The water inlet of the third water pipe 161 is connected to a tap water source, the water outlet of the third water pipe 161 is connected to the water inlet end of the first water pump 162, and the water outlet end of the first water pump 162 communicates with the first heat exchange chamber. By using tap water as the heat exchange medium, tap water is cheap and easily available, which is beneficial to reducing the operating cost of the system.

[0030] Optionally, a first filter 163 may be provided on the third water pipe 161 to filter impurities in the water entering the third water pipe 161, so as to prevent impurities from entering the first water pump 162 and affecting the normal operation of the first water pump 162, thereby ensuring the operating reliability of the first water pump 162.

[0031] In some embodiments of the present application, the refrigeration system 100 further includes a fourth water pipe 171 and a second water pump 172. The water inlet of the fourth water pipe 171 is connected to a domestic water source, the water outlet of the fourth water pipe 171 is connected to the water inlet end of the second water pump 172, and the water outlet end of the second water pump 172 communicates with the first heat exchange chamber.

[0032] Optionally, a second filter 173 may be provided on the fourth water pipe 171 to filter impurities in the water entering the fourth water pipe 171, so as to prevent impurities from entering the second water pump 172 and affecting the normal operation of the second water pump 172, thereby ensuring the operating reliability of the second water pump 172.

[0033] Optionally, the hot water system 200 further includes a water storage tank 240, and the water inlet of the water storage tank 240 is connected to the water outlet of the third heat exchanger 220. The water storage tank 240 stores the hot water of the hot water system 200, which is convenient for users to use.

[0034] In some embodiments of the present application, a first throttling member 180 is connected between the refrigerant inlet of the second heat exchanger 130 and the refrigerant outlet of the first heat exchanger 120. Optionally, the first throttling member 180 may be an expansion valve, a throttle valve or a capillary tube.

[0035] In some embodiments of the present application, a second throttling member 250 is connected between the refrigerant outlet of the third heat exchanger 220 and the refrigerant inlet of the fourth heat exchanger 230. Optionally, the second throttling member 250 may be an expansion valve (such as an electronic expansion valve or a thermostatic expansion valve), a throttle valve or a capillary tube.

[0036] In summary, the refrigeration-hot water system provided by the embodiments of the present application has the following beneficial effects:

[0037] 1. The heat exchange medium of the refrigeration-hot water system can use tap water as the medium, which is cheap and easily available, and the water volume and flow rate can be adjusted according to the heat exchange situation;

[0038] 2. By using water as the heat exchange medium, the fan is reduced compared to traditional air-cooled heat exchange. Moreover, the heat exchange effect of water is better than that of air, which can reduce the area of the first heat exchanger 120. And the first heat exchanger 120 can be arranged in multiple rows side by side, greatly reducing the size of the refrigeration system 100 and the structural cost.

[0039] 3. The refrigeration-hot water system utilizes the waste heat of the refrigeration system 100 and the waste cold of the hot water system 200, reduces energy loss, improves utilization efficiency, can achieve the effects of reducing energy consumption and improving energy efficiency, and promotes cost reduction, efficiency increase, energy conservation and emission reduction.

[0040] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0041] The above has introduced the refrigeration-hot water system provided by the embodiments of the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A cooling-hot water system, characterized in that: The invention comprises a refrigeration system (100) and a hot water system (200), wherein the refrigeration system (100) comprises a first compressor (110), a first heat exchanger (120), and a second heat exchanger (130), and the hot water system (200) comprises a second compressor (210), a third heat exchanger (220), and a fourth heat exchanger (230); The refrigerant outlet of the first compressor (110) is connected to the refrigerant inlet of the first heat exchanger (120), the refrigerant outlet of the first heat exchanger is connected to the refrigerant inlet of the second heat exchanger (130), and the refrigerant outlet of the second heat exchanger (130) is connected to the refrigerant inlet of the first compressor (110); The refrigerant outlet of the second compressor (210) is connected to the refrigerant inlet of the third heat exchanger (220), the refrigerant outlet of the third heat exchanger (220) is connected to the refrigerant inlet of the fourth heat exchanger (230), and the refrigerant outlet of the fourth heat exchanger (230) is connected to the refrigerant inlet of the second compressor (210); The water inlet of the first heat exchanger (120) is connected to a domestic water source, and the water outlet of the first heat exchanger (120) is connected to the water inlet of the third heat exchanger (220).

2. The cooling-hot water system according to claim 1, characterized in that: The first heat exchanger (120) comprises a first refrigerant pipe, a first water pipe and a first heat exchange cavity for accommodating a heat exchange medium, wherein the first refrigerant pipe and the first water pipe are both arranged through the heat exchange cavity; The refrigerant inlet of the first refrigerant pipe is connected to the refrigerant outlet of the first compressor (110), the refrigerant outlet of the first refrigerant pipe is connected to the refrigerant inlet of the second heat exchanger (130), the water inlet of the first water pipe is connected to the domestic water source, and the water outlet of the first water pipe is connected to the water inlet of the third heat exchanger (220).

3. The cooling-hot water system according to claim 2, characterized in that: The fourth heat exchanger (230) includes a second refrigerant pipe and a second heat exchange cavity for accommodating a heat exchange medium. The second refrigerant pipe is passed through the second heat exchange cavity. The refrigerant inlet of the second refrigerant pipe is connected to the refrigerant outlet of the third heat exchanger (220), and the refrigerant outlet of the second refrigerant pipe is connected to the refrigerant inlet of the second compressor (210).

4. The cooling-hot water system according to claim 3, characterized in that: The outlet of the first heat exchange chamber is communicated with the inlet of the second heat exchange chamber through a first pipe, and the outlet of the second heat exchange chamber is communicated with the inlet of the first heat exchange chamber through a second pipe.

5. The cooling-hot water system according to claim 2, characterized in that: The first heat exchanger (120) is provided with a discharge pipe (140) communicating with the first heat exchange chamber, and the discharge pipe (140) is provided with a valve (150) for opening and closing the discharge pipe (140).

6. The cooling-hot water system according to claim 2, characterized in that: The heat exchange medium is tap water. The refrigeration system (100) further comprises a third water pipe (161) and a first water pump (162). The water inlet of the third water pipe (161) is connected to a tap water source, the water outlet of the third water pipe (161) is connected to the water inlet of the first water pump (162), and the water outlet of the first water pump (162) is connected to the first heat exchange chamber.

7. The cooling-hot water system according to claim 2, characterized in that: The refrigeration system (100) further comprises a fourth water pipe (171) and a second water pump (172), wherein the water inlet of the fourth water pipe (171) is connected to a domestic water source, the water outlet of the fourth water pipe (171) is connected to the water inlet of the second water pump (172), and the water outlet of the second water pump (172) is connected to the first heat exchange chamber.

8. The cooling-hot water system according to any one of claims 1 to 7, characterized in that: The hot water system (200) further comprises a water storage tank (240), wherein the water inlet of the water storage tank (240) is connected to the water outlet of the third heat exchanger (220).

9. The cooling-hot water system according to any one of claims 1 to 7, characterized in that: A first throttling element (180) is connected between the refrigerant inlet of the second heat exchanger (130) and the refrigerant outlet of the first heat exchanger (120).

10. The cooling-hot water system according to any one of claims 1 to 7, characterized in that: A second throttling element (250) is connected between the refrigerant outlet of the third heat exchanger (220) and the refrigerant inlet of the fourth heat exchanger (230).

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