A heat recovery energy-saving system for dishwasher

Abstract

A dishwasher heat recovery energy-saving system includes a primary heat exchanger, a secondary heat exchanger, a cooling heat exchanger, a compressor, a throttling mechanism, an exhaust device and a heating component. The primary heat exchanger has a channel 1 and a channel 2 for mutual heat exchange, the secondary heat exchanger has a channel 3 and a channel 4 for mutual heat exchange, the cooling heat exchanger has a channel 5 and a channel 6 for mutual heat exchange, the system water inlet is connected to the inlet of channel 1, the outlet of channel 1 is connected to the inlet of channel 3, the outlet of channel 3 is connected to the inlet of the heating component, the outlet of the heating component is connected to the water inlet of the dishwasher, the drain outlet of the dishwasher is connected to the inlet of channel 2, the outlet of channel 2 is connected to the system drain, and the steam exhaust outlet of the dishwasher is connected to the inlet of channel 5. The utility model makes full use of the waste heat of waste water and steam discharged during the operation of the dishwasher, realizes partial or complete replacement of the original hot water with electricity, steam or other heating methods, reduces the working energy consumption of the dishwasher, and reduces the operating cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat recovery and utilization of dishwashers, and in particular relates to a heat recovery and energy-saving system for dishwashers. Background Art

[0002] With the increasing development of the national commercial economy, the scale and specialization of the catering industry are becoming more and more significant. At the same time, the promulgation of public health regulations by the health department has continuously improved the hygiene requirements for the catering industry, which has led to a strong demand for commercial dishwashers. The development of domestic commercial dishwashers is still in its early stages, and the commercial dishwasher industry that meets the needs of hotels, restaurants, public canteens and other occasions will usher in a good opportunity for vigorous development. As society continues to pay more attention to environmental protection and energy conservation and emission reduction, commercial dishwashers have begun to receive increasing attention from society in order to reduce water and energy consumption and reduce negative impacts on the environment.

[0003] Currently, commercial dishwashers use electric heating, steam or other heating methods, but these heating methods cannot fully utilize the waste heat of the dishwasher. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model aims to provide a dishwasher heat recovery energy-saving system.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] A heat recovery and energy-saving system for a dishwasher comprises a primary heat exchanger, a secondary heat exchanger, a cooling heat exchanger, a compressor, a throttling mechanism, an exhaust device and a heating component. The primary heat exchanger comprises a channel 1 and a channel 2 for mutual heat exchange, the secondary heat exchanger comprises a channel 3 and a channel 4 for mutual heat exchange, the cooling heat exchanger comprises a channel 5 and a channel 6 for mutual heat exchange, the system water inlet is connected to the inlet of the channel 1, the outlet of the channel 1 is connected to the inlet of the channel 3, the outlet of the channel 3 is connected to the inlet of the heating component, the outlet of the heating component is connected to the water inlet of the dishwasher, the drain outlet of the dishwasher is connected to the inlet of the channel 2, the outlet of the channel 2 is connected to the system drain, the steam exhaust outlet of the dishwasher is connected to the inlet of the channel 5, the outlet of the channel 5 is connected to the exhaust device, the outlet of the channel 4 is connected to the inlet of the throttling mechanism, the outlet of the throttling mechanism is connected to the inlet of the channel 6, the outlet of the channel 6 is connected to the inlet of the compressor, the outlet of the compressor is connected to the inlet of the channel 4, and refrigerant circulates in the channel 4, the channel 6, the compressor and the throttling mechanism.

[0007] Preferably, a steam air volume regulating mechanism is connected between the steam discharge port of the dishwasher and the inlet of channel five.

[0008] Preferably, an air volume regulating mechanism is connected to the inlet of channel five.

[0009] Beneficial effects of the utility model

[0010] Compared with the prior art, the advantages of the present invention are:

[0011] The utility model makes full use of the waste heat of waste water and steam discharged during the operation of the dishwasher, and partially or completely replaces the original hot water with electricity, steam or other heating methods, which greatly reduces the working energy consumption of the dishwasher and reduces the operating cost; at the same time, it can reduce the exhaust temperature and drainage temperature of the dishwasher, and greatly improve the impact of the heating of the dishwasher on the working environment and sewage discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Among them: 1-primary heat exchanger, 2-compressor, 3-cooling heat exchanger, 4-throttling mechanism, 5-secondary heat exchanger, 6-exhaust device, 7-heating component, 8-air volume adjustment mechanism, 9-steam volume adjustment mechanism. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] In the description of the present invention, it should be noted that the terms "upper / lower end", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0016] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting / sleeving", "sleeve connection", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] See also Figure 1 The utility model provides a technical solution: a dishwasher heat recovery energy-saving system, comprising a primary heat exchanger 1, a secondary heat exchanger 5, a cooling heat exchanger 3, a compressor 2, a throttling mechanism 4, an exhaust device 6 and a heating component 7, wherein the primary heat exchanger 1 has a channel 1 and a channel 2 for mutual heat exchange, the secondary heat exchanger 5 has a channel 3 and a channel 4 for mutual heat exchange, the cooling heat exchanger 3 has a channel 5 and a channel 6 for mutual heat exchange, the system water inlet is connected to the inlet of the channel 1, the outlet of the channel 1 is connected to the inlet of the channel 3, the outlet of the channel 3 is connected to the compressor 7, the exhaust device 6 and the heating component 7 are provided. The inlet of the thermal component 7 and the outlet of the heating component 7 are connected to the water inlet of the dishwasher, the drain outlet of the dishwasher is connected to the inlet of channel two, the outlet of channel two is connected to the system drain, the steam exhaust port of the dishwasher is connected to the inlet of channel five, the outlet of channel five is connected to the exhaust device 6, the outlet of channel four is connected to the inlet of the throttling mechanism 4, the outlet of the throttling mechanism 4 is connected to the inlet of channel six, the outlet of channel six is ​​connected to the inlet of the compressor 2, the outlet of the compressor 2 is connected to the inlet of channel four, and refrigerant circulates in the channel four, channel six, compressor 2, and throttling mechanism 4.

[0018] The working process of the utility model is:

[0019] The system inlet water passes through channel 1 of the primary heat exchanger 1, channel 3 of the secondary heat exchanger 5 and the heating component, and finally flows into the water inlet of the dishwasher. The hot water discharged from the drain outlet of the dishwasher passes through channel 2 of the primary heat exchanger 1 and exchanges heat with the system inlet water in channel 1, which increases the inlet water temperature on the one hand and reduces the drain water temperature on the other hand. Heat is extracted from the drain water into the inlet water, realizing the initial heating of the system inlet water.

[0020] The steam from the dishwasher exchanges heat with the refrigerant in channel 6 through channel 5 of the cooling heat exchanger 3. On the one hand, the refrigerant absorbs the heat of the steam and evaporates. On the other hand, the steam is cooled and condensed by the refrigerant and then discharged from the exhaust device 6.

[0021] The refrigerant that absorbs heat from the cooling heat exchanger 3 is compressed by the compressor 2 to increase enthalpy and then enters the channel 4 of the secondary heat exchanger 5, and performs heat exchange with the system inlet water that enters the channel 3 of the secondary heat exchanger 5 after being heated from the primary heat exchanger 1. On the one hand, the refrigerant is cooled and condensed, and on the other hand, the system inlet water is heated again;

[0022] The cooled and condensed refrigerant passes through the throttling mechanism 4 to reduce pressure and temperature, and then enters the channel 6 of the cooling heat exchanger 3. After absorbing heat in the cooling heat exchanger 3, it enters the compressor 2 and is compressed by the compressor 2 again, and the cycle repeats.

[0023] The temperature of the system inlet water that has been heated twice in the primary heat exchanger 1 and the secondary heat exchanger 5 may still not meet the requirements of the dishwasher, so it is heated again by the heating component 7 and then sent to the dishwasher.

[0024] In the above steps, the heat of waste hot water and steam discharged during the operation of the dishwasher is fully utilized to heat the system inlet water, thereby partially or completely replacing the original hot water with electricity, steam or other heating methods, greatly reducing the working energy consumption of the dishwasher and reducing operating costs; at the same time, the exhaust temperature and drainage temperature of the dishwasher can be reduced, greatly improving the impact of the dishwasher's heating on the working environment and sewage discharge.

[0025] Furthermore, a steam air volume regulating mechanism 9 is connected between the steam discharge port of the dishwasher and the inlet of the channel 5, for controlling the air volume regulation of steam extraction.

[0026] Furthermore, the inlet of channel 5 is connected with an air volume regulating mechanism 8, which is used to control the flow rate of the outside air entering the cooling heat exchanger 3, so as to ensure the stability of the system operation, and further adjust the exhaust air temperature to preliminarily control the temperature inside the dishwasher. The air volume regulating mechanism 8 can be omitted according to the specific design and application scenario, so as to cancel or keep constant the flow rate of the outside air entering the cooling heat exchanger 3.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0028] It should be noted that, in this article, "channel" is a broad descriptive term, which is only used to describe the passage of media on both sides of the heat exchanger. The media may be water, refrigerant, air or steam.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, simplifications, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dishwasher heat recovery energy-saving system, characterized in that: The invention comprises a primary heat exchanger (1), a secondary heat exchanger (5), a cooling heat exchanger (3), a compressor (2), a throttling mechanism (4), an exhaust device (6) and a heating component (7), wherein the primary heat exchanger (1) has a channel 1 and a channel 2 for mutually exchanging heat, the secondary heat exchanger (5) has a channel 3 and a channel 4 for mutually exchanging heat, the cooling heat exchanger (3) has a channel 5 and a channel 6 for mutually exchanging heat, the system water inlet is connected to the inlet of the channel 1, the outlet of the channel 1 is connected to the inlet of the channel 3, the outlet of the channel 3 is connected to the inlet of the heating component (7), and the heating component (7) is connected to the heating component (7). The outlet of the component (7) is connected to the water inlet of the dishwasher, the drain outlet of the dishwasher is connected to the inlet of the second channel, the outlet of the second channel is connected to the system drain, the steam discharge outlet of the dishwasher is connected to the inlet of the fifth channel, the outlet of the fifth channel is connected to the exhaust device (6), the outlet of the fourth channel is connected to the inlet of the throttling mechanism (4), the outlet of the throttling mechanism (4) is connected to the inlet of the sixth channel, the outlet of the sixth channel is connected to the inlet of the compressor (2), the outlet of the compressor (2) is connected to the inlet of the fourth channel, and the refrigerant circulates in the fourth channel, the sixth channel, the compressor (2), and the throttling mechanism (4).

2. A dishwasher heat recovery energy-saving system according to claim 1, characterized in that: A steam air volume adjustment mechanism (9) is connected between the steam discharge port of the dishwasher and the inlet of the channel five.

3. A dishwasher heat recovery energy-saving system according to claim 2, characterized in that: The inlet of channel five is connected to an air volume adjustment mechanism (8).

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