Cold and heat recovery system

Abstract

The utility model relates to a cold and heat recovery system. The cold and heat recovery system comprises a water cooling system and an air circulation system. The water cooling system comprises a water cooling unit, a water storage tank, a surface air cooler, a spraying chamber and a heat exchanger. The water chilling unit is configured so as to be able to supply chilled water to the water storage tank and the surface air cooler, and the surface air cooler is configured so as to be able to supply condensed water condensed from air circulating in the air circulation system to the water storage tank. The water storage tank is configured to respectively supply water stored in the water storage tank to the spray chamber and the heat exchanger; the air circulation system comprises a fresh air pipeline, an air supply pipeline and an air return pipeline. The cold and heat recovery system and the control method have a refrigeration mode and a heat supply mode, and the refrigeration mode comprises a single refrigeration mode and a humidification mode. According to the cold and heat recovery system and the control method thereof, consumed electric power can be saved, and the effects of saving energy and improving efficiency are achieved.

Description

Technical Field

[0001] This application relates to heat recovery systems, and more particularly to heat recovery systems used in yeast cultivation processes. Background Technology

[0002] With the continuous expansion of the food processing industry and the increase in the number of small and medium-sized food factories, energy consumption and pollution pressure have increased. Therefore, providing a suitable processing environment to meet the temperature, humidity, and air quality requirements of each production process is crucial. Taking the yeast processing flow as an example, the fermentation / cultivation of raw materials generates a large amount of heat during the three major processes of yeast making, yeast cultivation, and yeast storage. The temperature and humidity environment of the room plays a key role in the fermentation of raw materials. Among them, the yeast making process mainly involves making the raw materials into yeast blocks; the yeast cultivation process mainly involves fermenting and cultivating the yeast blocks in a specified environment, thereby generating Aspergillus and other fungi required for brewing; the yeast storage process mainly involves preserving the cultivated yeast blocks. In the past, the yeast processing technology had the problem of consuming a large amount of electricity to meet the temperature and humidity requirements of the yeast production process, and the large amount of heat generated in the process was not effectively utilized. Utility Model Content

[0003] This application is made in view of the technical problems existing in the prior art. One object of this application is to provide a heat recovery system and its control method, which can effectively utilize the heat generated in the yeast production process, thereby reducing the power consumption used in the production process.

[0004] According to one aspect of this application, a heat recovery system is provided. The heat recovery system includes a water cooling system and an air circulation system. The water cooling system includes a water chiller, a water storage tank, a surface cooler, a spray chamber, and a heat exchanger. The water chiller is configured to supply chilled water to the water storage tank and the surface cooler respectively. The surface cooler is configured to supply condensate condensed from the air circulating in the air circulation system to the water storage tank. The water storage tank is configured to supply water stored in it to the spray chamber and the heat exchanger respectively. The air circulation system includes: a fresh air duct supplying fresh air to the spray chamber and the surface cooler; a supply air duct supplying air that has been temperature- and / or humidity-conditioned in the spray chamber and the surface cooler to an air-conditioned room requiring air conditioning; and a return air duct returning air, which has been air-conditioned in the air-conditioned room, to the spray chamber and the surface cooler.

[0005] The heat recovery system described above according to this application can also be: the heat recovery system has a cooling mode that puts the water-cooled unit into operation and a heating mode that puts the water-cooled unit into non-operation.

[0006] According to the above-described heat recovery system of this application, the cooling mode may also include a single cooling mode in which both the spray chamber and the surface cooler are in working condition, and a humidification mode in which the spray chamber is in working condition while the surface cooler is in non-working condition.

[0007] According to the above-described heat recovery system of this application, it can also be configured such that: a sprayer and a tank for receiving spray water sprayed from the sprayer are provided in the spray chamber; the water cooling system is configured such that when the liquid level in the tank is lower than a predetermined value, water is supplied from the water storage tank to the spray chamber as spray water; and when the liquid level in the tank reaches or exceeds the predetermined value, the fluid communication between the water storage tank and the spray chamber is cut off to form an independent spray circulation system.

[0008] According to the above-described heat recovery system of this application, the water cooling system may also include a switching mechanism that can switch between a state in which water in the storage tank is supplied to the spray chamber, a state in which water in the spray chamber is returned to the storage tank, and a state in which the fluid communication between the storage tank and the spray chamber is cut off to form an independent spray circulation system.

[0009] According to the above-described heat recovery system of this application, the spray chamber may also be equipped with a drain valve for discharging water from the tank to outside the water cooling system.

[0010] According to the above-described heat recovery system of this application, it can also be: a heat exchanger valve is provided in the water cooling system to allow at least a portion of the water to circulate between the water storage tank and the heat exchanger when the liquid level and temperature in the water storage tank reach or exceed their respective predetermined values.

[0011] The above-described heat recovery system according to this application can also be: the heat recovery system is a heat recovery system for the yeast cultivation process, the air-conditioned room includes a yeast cultivation room and / or a yeast storage room, and the heat exchanger is used to exchange heat between the water from the water storage tank and the process water in the yeast production room.

[0012] The heat recovery system described above in this application may also include a cooling tower connected to the water-cooled unit.

[0013] The effects of the invention

[0014] According to the heat recovery system of this application, the condensate generated by the surface cooler can be collected by the water storage tank and supplied to the spray chamber for spraying, thereby regulating the temperature and humidity of the air to be supplied to the air-conditioned room (i.e., the mixed air formed by fresh air and return air from the air-conditioned room to the spray chamber and surface cooler). As a result, the load on the water-cooled unit can be reduced, the power consumption required by the system can be saved, and the energy-saving and efficiency-enhancing effects can be achieved.

[0015] In addition, by having a cooling mode that puts the water-cooled unit into operation and a heating mode that puts the water-cooled unit into non-operational state, it can meet both the cooling needs in summer and the heating needs in winter.

[0016] In addition, the cooling modes, including single cooling mode and humidification mode, can meet different humidity requirements during the production process.

[0017] In addition, by forming an independent spray circulation system between the sprayers and the tank in the spray chamber, which does not rely on the supply of water from the storage tank, the energy efficiency of the system can be further improved.

[0018] In addition, by utilizing the switching mechanism, the flow direction of water between the water storage tank and the spray chamber can be changed as needed, which can flexibly recover the cold or heat contained in the mixed air flowing through the spray chamber, and can easily form an independent spray circulation system, thereby improving the system's energy efficiency.

[0019] In addition, by using a drain valve to drain the water from the spray chamber's tank, the cooling or heating capacity of the system can be adjusted more flexibly.

[0020] In addition, by installing a valve for the heat exchanger, and by circulating at least a portion of the water between the water storage tank and the heat exchanger when the liquid level and temperature in the water storage tank reach or exceed their respective specified values, the cold or heat energy recovered from the water in the water storage tank can be more fully utilized for heat exchange on equipment that requires temperature regulation.

[0021] In addition, the cold and heat recovery system of this application can fully recover and utilize the cold and / or heat generated in the yeast cultivation process, saving electricity consumption while effectively regulating the temperature and / or humidity in different stages of the yeast cultivation process (yeast cultivation room, yeast storage room, yeast making room).

[0022] In addition, by circulating water between the water-cooled unit and the cooling tower, the heat in the system can be discharged outside the system using the cooling tower, which can further reduce the load on the water-cooled unit and save the power required by the system. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a heat recovery system according to one embodiment of this application.

[0024] Figure 2 This is a schematic diagram illustrating a single-cooling mode of a heat recovery system according to one embodiment of this application.

[0025] Figure 3 This is a schematic diagram illustrating the humidification mode of a heat recovery system according to one embodiment of this application.

[0026] Figure 4 This is a schematic diagram illustrating the heating mode of a heat recovery system according to one embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1 Water-cooled unit

[0029] 2 Water storage tank

[0030] 3 Surface Coolers

[0031] 4 Spray Room

[0032] 4a Sprayer

[0033] 4b slot

[0034] 5. Heat exchanger

[0035] 6 Cooling Tower

[0036] 7 Fresh air duct

[0037] 8. Air supply duct

[0038] 9 Return air duct

[0039] 10. Four-way valve (switching mechanism)

[0040] Pumps 11, 12, 13, and 14

[0041] Temperature sensors 15 and 16

[0042] Valves 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27

[0043] 28 Temperature and humidity sensor

[0044] 29 Drain valve

[0045] 30 Peiqu Room

[0046] 31. Storage Room

[0047] 32. Fermentation Room

[0048] 100 Cold and Heat Recovery System

[0049] 110 Water cooling system

[0050] 120 Air Circulation System Detailed Implementation

[0051] The present disclosure is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. The aspects so defined may be combined with any other aspect or aspects unless expressly stated otherwise. In particular, any feature considered preferred or advantageous may be combined with one or more other features considered preferred or advantageous.

[0052] The terms "first" and "second" used in this disclosure are merely for ease of description and to distinguish different components with the same name, and do not indicate a sequential or primary / secondary relationship.

[0053] Furthermore, when a component is referred to as being "on" another component, the component may be directly on the other component, or it may be indirectly on the other component with one or more intermediate components inserted between them. Additionally, when a component is referred to as being "connected to" another component, the component may be directly connected to the other component, or it may be indirectly connected to the other component with one or more intermediate components inserted between them. In the following drawings, the same reference numerals denote the same components.

[0054] The descriptions of orientation or positional relationships using terms such as "upper," "lower," "top," "bottom," "front," "back," "inner," and "outer" in this disclosure are for the convenience of describing this disclosure only, and are not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application.

[0055] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0056] Figure 1 This describes a heat recovery system 100 according to one embodiment of this application. For example... Figure 1 As shown, the heat recovery system 100 includes a water cooling system 110 and an air circulation system 120.

[0057] The water-cooling system 110 includes a water-cooled unit 1, a water storage tank 2, a surface cooler 3, a spray chamber 4, and a heat exchanger 5. The water-cooled unit 1 can be, for example, an integrated water-cooled unit with a compressor, evaporator, condenser, throttling device, etc., or it can be replaced by a heat pump or any other known refrigeration and / or heating equipment. The water storage tank 2 is a device for storing water. Pipelines capable of fluidly communicating with each other are respectively provided between the water-cooled unit 1 and the water storage tank 2, and between the water-cooled unit 1 and the surface cooler 3, and valves 21, 23, and 24 are provided in these pipelines for controlling the flow of water in the pipelines. By controlling the opening and closing of valves 21, 23, and 24, water cooled by the water-cooled unit 1 can be selectively supplied to the water storage tank 2 or to the surface cooler 3, or simultaneously to both the water storage tank 2 and the surface cooler 3. Furthermore, a pipeline connecting the water storage tank 2 and the surface cooler 3 is provided, and valves 18 and 19 for controlling the water flow are installed in this pipeline. By controlling the opening and closing of valves 18 and 19, condensate generated by the surface cooler 3 can be selectively collected into the water storage tank 2. Thus, the water storage tank 2 can store water from the water-cooled unit 1 and collect condensate generated by the surface cooler 3. Furthermore, a pipeline connecting the water storage tank 2 and the spray chamber 4 is provided, and valve 20, pump 11, and four-way valve 10 as switching mechanisms are installed in this pipeline. The supply of water from the water storage tank 2 to the spray chamber 4 can be controlled by opening and closing valve 20, switching pump 11, and switching four-way valve 10. In addition, a pipeline connecting the water storage tank 2 and the heat exchanger 5 is provided, and valves 20 and 17, as well as pump 12, are installed in this pipeline. By controlling the opening and closing of valves 20 and 17 and the switching on and off of pump 12, the water supply from the water storage tank to the heat exchanger 5 can be controlled. Furthermore, return water pipelines for returning water to the water cooling unit 1 are provided between the surface cooler 3 and the water-cooled unit 1, and between the heat exchanger 5 and the water-cooled unit 1. Pump 13 and valve 25 are installed in the return water pipelines. By controlling the opening and closing of valve 25 and the switching on and off of pump 13, the return flow of water from the surface cooler 3 and the heat exchanger 5 to the water-cooled unit 1 can be controlled respectively. The spray chamber 4 is equipped with a sprayer 4a for spraying water from the water storage tank 2 and a tank 4b for receiving the water sprayed by the sprayer 4a.

[0058] Additionally, the air circulation system 120 includes a fresh air duct 7, a supply air duct 8, and a return air duct 9. The fresh air duct 7 supplies fresh air, which is outside the system, to the spray chamber 4 and the surface cooler 3. The supply air duct 8 delivers air that has been temperature and / or humidity regulated in the spray chamber 4 and the surface cooler 3 to an air-conditioned room requiring air conditioning. When the heat recovery system 100 of this application is applied to the yeast cultivation process, the air-conditioned room may, for example, be a yeast cultivation room 30 and / or a yeast storage room 31. The return air duct 9 is used to return the return air, which has been air-conditioned in the air-conditioned room (e.g., the yeast cultivation room 30 and / or the yeast storage room 31), to the spray chamber 4 and the surface cooler 3. Thus, in practice, when the heat recovery system 100 is operating, the fresh air supplied to the spray chamber 4 by the fresh air duct 7 and the return air supplied to the spray chamber 4 by the return air duct 9 mix to form mixed air. Inside the spray chamber 4, the mixed air exchanges heat and moisture with the spray water sprayed by the sprayer 4a. Then, the surface cooler 3 cools and dehumidifies the mixed air. Finally, the air that has been conditioned at temperature and / or humidity at the spray chamber 4 and the surface cooler is sent to the air-conditioned room (e.g., the curing room 30, the storage room 31) via the air supply duct 8.

[0059] Below, please refer to the appendix. Figure 2 , 3 Sections 4 and 5 describe the three operating modes of the heat recovery system 100 of this application and the related control methods. Among them, Figure 2 This is a schematic diagram illustrating a single-cooling mode of a heat recovery system according to one embodiment of this application; Figure 3 This is a schematic diagram illustrating the humidification mode of a cold and heat recovery system according to one embodiment of this application; Figure 4 This is a schematic diagram illustrating the heating mode of a heat recovery system according to one embodiment of this application.

[0060] In the process of cultivating yeast, the temperature and / or humidity of the yeast cultivation room 30 and the yeast storage room 31 need to be adjusted as needed. In addition, the temperature of the process water in the yeast production room also needs to be adjusted.

[0061] In environments with high temperatures, such as during summer, the heat recovery system 100 can operate in cooling mode to cool the fermentation room 30 and the storage room 31. Additionally, depending on environmental humidity and / or process requirements, humidification of the fermentation room 30 and the storage room 31 may sometimes be necessary. Therefore, the cooling modes of the heat recovery system 100 according to this application include a single-cooling mode where humidification of the fermentation room 30 and the storage room 31 is not required, and a humidification mode where humidification of the fermentation room 30 and the storage room 31 is required. As an example, a temperature and humidity sensor 28 can be installed in the air supply duct 8 to determine whether the heat recovery system 100 uses a single-cooling mode or a humidification mode based on the temperature and humidity of the air supplied to the fermentation room 30 and the storage room 31 detected by the temperature and humidity sensor 28.

[0062] In cooling mode, such as Figure 2 As shown, by opening valves 21, 23, and 24, the water-cooled unit 1 can be used as the first cold source, and two low-temperature water supply paths are formed from the water-cooled unit 1. One water supply path is the path that supplies the low-temperature water generated by the water-cooled unit 1 to the surface cooler 3 via valve 23. The surface cooler 3 uses the low-temperature water supplied by the water-cooled unit 1 to cool and dehumidify the mixed air formed by the fresh air supplied by the fresh air duct 7 and the return air supplied by the return air duct 9. The other water supply path is the path that supplies the low-temperature water generated by the water-cooled unit 1 to the water storage tank 2 via valve 21, which is used to ensure the liquid level and cooling capacity requirements of the water storage tank (9). In addition, the condensate generated when the surface cooler 3 processes the mixed air is collected in the water storage tank 2. The condensate collected in the water storage tank 2 is formed by the condensation on the surface of the surface cooler 3 during the heat exchange between the relatively high-temperature mixed air and the low-temperature water flowing in the surface cooler 3, and its temperature is higher than that of the low-temperature water. Since the water stored in the water tank 2 includes condensate collected from the surface cooler 3 at a temperature higher than that of the low-temperature water, the water stored in the water tank 2 is at a higher temperature than the low-temperature water supplied by the water-cooled unit 1, and is referred to here as medium-low temperature water.

[0063] Furthermore, by opening valves 17, 18, 19, and 20, and switching the connection direction of the four-way valve 10, the water storage tank 2 can be used as a second cold source, forming two medium-low temperature water supply paths originating from the water storage tank 2. One of these paths supplies medium-low temperature water to the spray chamber 4 by switching the four-way valve 10 to open the ac direction and close the bd direction as shown in the diagram. This medium-low temperature water is then supplied to the sprayer 4a located in the spray chamber 4, and the sprayer 4a sprays the mixed air formed by the fresh air and return air, thus pre-cooling the mixed air. The other medium-low temperature water supply path supplies medium-low temperature water to the heat exchanger 5 via valve 17, and is used to regulate the temperature of the process water in the fermentation room 32 using the medium-low temperature water supplied to the heat exchanger 5.

[0064] Based on the results detected by the temperature and humidity sensor 28, it is determined that the heat recovery system 100 is operating in cooling mode only.

[0065] In single-cooling mode, valves 23, 18, and 19 are opened, and the water-cooled unit 1 supplies low-temperature water to the surface cooler 3. As mentioned earlier, the surface cooler 3 cools the mixed air, and the condensate generated when the mixed air passes through the surface cooler 3 is collected in the water storage tank 2 via valves 18 and 19. A level sensor (not shown) and a temperature sensor 15 are installed in the water storage tank 2. The opening degree of valve 21 is determined based on the liquid level and temperature detected by the level sensor and temperature sensor 15 to control the flow rate of low-temperature water supplied by the water-cooled unit 1 to the water storage tank 2. Furthermore, the start-up timing of pump 12 is determined based on the water temperature in the water storage tank 2 detected by the temperature sensor 15. Thus, the water storage tank 2 serves as a device with drainage, overflow, and replenishment functions to meet requirements for water pressure, flow rate, etc. By adjusting the opening of valve 17 in the pipeline connecting water tank 2 and heat exchanger 5, the flow rate and / or cooling capacity of the water supplied from water tank 2 to spray chamber 4 and heat exchanger 5 can be changed.

[0066] When the four-way valve 10 is in the state of opening in the AC direction and closing in the BD direction, at least a portion of the medium-low temperature water in the water storage tank 2 is supplied to the spray chamber 4. During a certain operating time of the heat recovery system 100, if the condensate from the surface cooler 3 can meet the flow / cooling capacity requirements of the water storage tank 2, then the spray water supplied from the water storage tank 2 to the spray chamber 4 mainly comes from the condensate generated by the surface cooler 3, without the need for a supply of low temperature water from the water-cooled unit 1.

[0067] A liquid level sensor (not shown) can also be installed in the tank 4b of the spray chamber 4. When the liquid level in the tank 4b reaches the specified value, the four-way valve 10 can be switched to open the ab direction and close the cd direction. At the same time, the pump 11 is turned on, thereby forming an independent spray circulation system between the sprayer 4a and the tank 4b in the spray chamber 4, without the need for water from the water storage tank 2.

[0068] In spray chamber 4, the mixed air, consisting of fresh and return air, comes into direct contact with the spray water, resulting in heat and moisture exchange. This reduces the temperature of the mixed air, serving a pre-cooling function. The temperature of the spray water rises and collects in tank 4b. When the temperature sensor 16 in tank 4b detects that the temperature inside the tank has risen above the upper limit, the drain valve 29 in tank 4b can be opened to drain water out of the heat recovery system 100. After draining the water from the spray chamber out of the heat recovery system, to maintain the stability of the pressure / flow rate of the spray circulation system, the four-way valve 10 can be switched back to the state where the AC direction is open and the BD direction is closed, allowing the water storage tank 2 to replenish water to the spray chamber 4.

[0069] During the processing of yeast starter, not only is cooling necessary to control the rate of temperature change in the yeast blocks, but appropriate humidity is also required to ensure the growth rate of microorganisms. Previously, humidifiers were needed for this purpose. The heat recovery system 100 of this application includes a temperature and humidity sensor 28 installed in the air supply duct 8. When the temperature and humidity sensor 28 detects insufficient humidity in the air supplied to the yeast preparation room 30 and the yeast storage room 31, the system switches to humidification mode.

[0070] like Figure 3 As shown, in humidification mode, valves 23, 18, and 19 are closed, while valves 21 and 20 are open. Thus, the water-cooled unit 1 only supplies low-temperature water to the water storage tank 2, while the surface cooler 3 is in a non-operating state. This reduces the dehumidification effect of the surface cooler 3, effectively acting as a humidifier for the air supplied to the curing chamber 30 and the curing storage chamber 31. In this situation, the water storage tank 2 supplies water to the spray chamber 4 and the heat exchanger 5 respectively via pump 12, and the flow rate / cooling capacity of the water supplied to the spray chamber 4 and the heat exchanger 5 can be changed by controlling the opening of valve 17.

[0071] Similar to the single-cooling mode, with the four-way valve 10 in the state of opening the AC direction and closing the BD direction, at least a portion of the low-temperature water in the water storage tank 2 is supplied to the spray chamber 4. When the liquid level sensor installed in the tank 4b of the spray chamber 4 detects that the liquid level in the tank 4b has reached a specified value, the four-way valve 10 can be switched to open the AB direction and close the CD direction. At the same time, the pump 11 is turned on, thereby forming an independent spray circulation system between the sprayer 4a and the tank 4b in the spray chamber 4. Furthermore, when the temperature sensor 16 installed in the tank 4b detects that the temperature in the tank has risen above the upper limit value, the drain valve 29 installed in the tank 4b can be opened to drain water outside the heat recovery system 100. In order to maintain the stability of the pressure / flow rate of the spray circulation system after draining the water from the spray chamber outside the heat recovery system, the four-way valve 10 can be switched back to the state of opening the AC direction and closing the BD direction, and the water storage tank 2 can replenish water to the spray chamber 4.

[0072] In humidification mode, since relatively high-temperature condensate is not supplied from the surface cooler 3 to the water storage tank, the water storage tank 2 can directly supply low-temperature water from the water-cooled unit 1. Thus, the heat and humidity exchange between the spray water from the sprayer 4a and the mixed air can simultaneously meet the cooling load and humidity requirements of the mixed air. In addition, when the temperature and humidity sensor 28 detects that the temperature and / or humidity of the air supplied in the air supply duct 8 cannot meet the process requirements of the fermentation chamber 30 and the storage chamber 31, the amount of spray water can be increased by adjusting the frequency of pumps 11 and 12 to improve the cooling and humidity supply to the mixed air, so that the cooling and humidity of the air supplied to the fermentation chamber 30 and the storage chamber 31 meet the process requirements.

[0073] In the cooling mode (cooling mode or humidification mode) during summer, by opening valves 17, 22, and 25 and starting pump 10, the return water from the surface cooler 3 and the return water from the heat exchanger 5 can flow back to the water-cooled unit 1 via valves 22 and 17.

[0074] Additionally, the heat recovery system of this application may also include a cooling tower 6 that is in fluid communication with the water-cooled unit 1. For example... Figure 2 , 3 As shown, by opening valves 26 and 27 and starting pump 14, water can be circulated between cooling tower 6 and water-cooled unit 1, thereby allowing the heat in the heat recovery system 100 to be discharged to the outdoor environment using cooling tower 6.

[0075] Furthermore, in low-temperature conditions such as winter, in order to ensure that the process water in the koji-making room 32 meets the requirements of the koji production process, the water-cooled unit 1 is put into a non-working state, thereby switching the heat recovery system 100 to the heating mode.

[0076] In heating mode, the demand for fresh air volume decreases. The high-temperature return air from the fermentation room 30 and the storage room 31 undergoes heat and humidity exchange in the spray chamber 4, causing the water in the tank 4b of the spray chamber 4 to heat up and become medium-high temperature water. By returning this medium-high temperature water to the water storage tank 2, the water storage tank 2 can supply medium-high temperature water to the spray chamber 4 and the heat exchanger 5 to meet the temperature requirements of the process water in the fermentation room 32.

[0077] Specifically, such as Figure 4As shown, in heating mode, valves 17, 18, 22, and 23 are closed, while valves 19, 20, 21, 24, and 25 are open. Pump 13 is started, and the water-cooled unit 1 is in a non-operating state. In this situation, by opening the four-way valve 10 in the ac direction and closing it in the bd direction, pump 12 supplies water from the water storage tank 2 to the sprayers 4a in the spray chamber 4. After the heat recovery system 100 has been running for a certain period, when the liquid level in the tank 4b reaches a predetermined value, the four-way valve 10 is opened in the ab direction and closed in the cd direction, and pump 11 is started, thereby forming an independent spray circulation system between the sprayers 4a and the tank 4b in the spray chamber 4. The return air from the curing chamber 30 and the storage chamber 31 comes into direct contact with the spray water, resulting in heat and moisture exchange. Thus, on the one hand, the temperature and humidity of the air supplied to the fermentation room 30 and the storage room 31 are regulated through the heat and humidity exchange between the return air and the spray water. On the other hand, the temperature of the spray water sprayed by the sprayer 4a is increased to form medium-high temperature water, which is collected in the tank 4b. When the temperature detected by the temperature sensor 16 reaches the upper limit, the four-way valve 10 is opened in the bd direction and closed in the ac direction, and the medium-high temperature water is returned to the water storage tank 2 via the valve 19. When the liquid level and temperature in the water storage tank 2 meet the requirements, the valve 17 is opened and the pump 12 is started to supply medium-high temperature water from the water storage tank 2 to the heat exchanger 5 in order to regulate the temperature of the process water in the fermentation room 32.

[0078] Furthermore, in heating mode, the temperature of the water delivered from the water storage tank 2 is detected by the temperature sensor 15. When the temperature sensor 15 detects that the temperature of the water delivered from the water storage tank 2 does not meet the temperature requirements, the opening of the valve 20 can be adjusted, and the frequency of the pump 11 can be controlled to regulate the circulating water flow, thereby increasing the temperature of the water returning from the tank 4b to the water storage tank 2.

[0079] When temperature sensor 15 detects that the temperature of the water supplied from water storage tank 2 has reached the required temperature, valve 17 is opened and valve 19 is closed. That is, valves 19, 22, and 23 are closed, while valves 17, 20, 21, 24, and 25 are open. Pumps 12 and 13 are started, keeping the water-cooled unit 1 in a non-operating state. In this state, by setting the four-way valve 10 to open in the bd direction and close in the ac direction, pump 12 supplies medium-high temperature water from water storage tank 2 to heat exchanger (28) via valves 17 and 20, so as to exchange heat with the process water in koji-making room 32, regulate the temperature of the process water, and thus achieve heating of koji-making room 32. That is, the heat carried by the return air in the fermentation room 30 and the storage room 31 is used to turn the water in the spray chamber 4 into medium-high temperature water. This medium-high temperature water is then recycled to the storage tank 2. Furthermore, the recycled medium-high temperature water is supplied from the storage tank 2 to the heat exchanger 5, which in turn raises the temperature of the process water in the fermentation room 32, thereby achieving a heating mode that meets the process hot water requirements of the fermentation room. Then, the medium-low temperature water is returned to the water chiller unit 1 by the pump 13, and then transported from the water chiller unit 1 back to the storage tank 2 via valves 24 and 21, thus forming a supply and return water loop.

[0080] The above describes a heat recovery system 100 and its control method as one embodiment of this application. Using the heat recovery system 100 and its control method as described above, condensate generated in the surface cooler 3 can be collected by the water storage tank 2 and supplied to the spray chamber 4 for spraying, thereby regulating the temperature and humidity of the air supplied to the curing room 30 and the curing room 31. This reduces the load on the water-cooled unit 1, saves the power consumed by the system, and achieves energy-saving and efficiency-enhancing effects. Furthermore, by having a cooling mode that puts the water-cooled unit 1 into operation and a heating mode that puts the water-cooled unit 1 into a non-operational state, both cooling needs in summer and heating needs in winter can be met. Moreover, by including a cooling-only mode and a humidification mode in the cooling mode, different humidity requirements during production can be addressed. In addition, since an independent spray circulation system independent of the water storage tank 2 can be formed between the sprayer 4a and the tank 4b in the spray chamber 4, the energy efficiency of the system can be further improved. Furthermore, by using the four-way valve 10 as a switching mechanism, the flow direction of water between the water storage tank 2 and the spray chamber 4 can be changed as needed, allowing for flexible recovery of the cold or heat contained in the mixed air flowing through the spray chamber 4. This also facilitates the formation of an independent spray circulation system, thereby improving the system's energy efficiency. Additionally, by draining the water from the tank 4a of the spray chamber 4 using the drain valve 29, the cold or heat in the system can be regulated. Furthermore, by providing a valve 17 (i.e., a heat exchanger valve) for switching the connection or disconnection of the pipeline between the water storage tank 2 and the heat exchanger 5, when the liquid level and temperature in the water storage tank 2 reach or exceed their respective specified values, at least a portion of the water circulates between the water storage tank 2 and the heat exchanger 5. This allows for the use of the cold or heat recovered from the water in the water storage tank 2 to regulate the temperature of the process water in the fermentation room 32. Therefore, by utilizing the heat recovery system 100 of this application, the cold and / or heat generated in the yeast cultivation process can be fully recovered and utilized, saving electricity consumption while effectively regulating the temperature and / or humidity in the yeast cultivation room 30, yeast storage room 31, yeast making room 32, etc. Furthermore, by circulating water between the water-cooled unit 1 and the cooling tower 6, and utilizing the cooling tower 6 to dissipate heat from the system, the load on the water-cooled unit 1 can be further reduced, saving the electricity consumed by the system.

[0081] The above describes one embodiment of the heat recovery system and control method of this application, but this application is not limited thereto. For example, as mentioned above, a heat pump type unit can also be used as a water-cooled unit to meet the needs of cooling in summer and heating in winter. When using a heat pump type unit, if the outlet water temperature of the storage tank cannot meet the requirements, the heat pump type unit can quickly provide medium-high temperature hot water for use as process water in the fermentation room. In addition, in the winter heating mode, since the latent heat in the air is recovered by relying on the circulation system of the spray chamber, there is a certain conversion efficiency, and the return air temperature (latent heat) is also the upper limit condition of the heat storage. Therefore, when using a heat pump type unit as a heat source, if the heat demand cannot be met, the heat pump type unit can be turned on to provide medium-high temperature hot water that meets the requirements to the storage tank, which is consistent with the heating process of the storage tank.

[0082] Alternatively, an electric heating device can be added to the water storage tank to address the hot water supply issue during winter and ensure the required outlet water temperature. With the electric heating device installed, its operation and output power can be controlled by monitoring the outlet water temperature.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A cold and heat recovery system, characterized in that, Including water cooling system and air circulation system, The water-cooling system includes a water-cooling unit, a water storage tank, a surface cooler, a spray chamber, and a heat exchanger. The water-cooling unit is configured to supply chilled water to the water storage tank and the surface cooler respectively. The surface cooler is configured to supply condensate condensed from the air circulating in the air circulation system to the water storage tank. The water storage tank is configured to supply water stored in it to the spray chamber and the heat exchanger respectively. The air circulation system includes: a fresh air duct supplying fresh air to the spray chamber and the surface cooler; a supply air duct supplying air that has been temperature and / or humidity regulated in the spray chamber and the surface cooler to an air-conditioned room requiring air conditioning; and a return air duct returning air, which is air conditioned in the air-conditioned room, to the spray chamber and the surface cooler.

2. The cold and heat recovery system as described in claim 1, characterized in that, The heat recovery system has a cooling mode that puts the water-cooled unit into operation and a heating mode that puts the water-cooled unit into a non-operational state.

3. The heat recovery system as described in claim 2, characterized in that, The cooling modes include a single-cooling mode in which both the spray chamber and the surface cooler are in working condition, and a humidification mode in which the spray chamber is in working condition while the surface cooler is in non-working condition.

4. The cold and heat recovery system as described in claim 3, characterized in that, The spray chamber is equipped with a sprayer and a tank for receiving spray water sprayed from the sprayer. The water cooling system is configured such that when the liquid level in the tank is lower than a specified value, water is supplied from the water storage tank to the spray chamber as spray water, and when the liquid level in the tank reaches or exceeds the specified value, the fluid connection between the water storage tank and the spray chamber is cut off to form an independent spray circulation system.

5. The heat recovery system as described in any one of claims 1 to 3, characterized in that, The water cooling system is equipped with a switching mechanism that can switch between states where water from the water storage tank is supplied to the spray chamber, water from the spray chamber is returned to the water storage tank, and the state where the fluid connection between the water storage tank and the spray chamber is cut off to form an independent spray circulation system.

6. The heat recovery system as described in claim 4, characterized in that, The water cooling system is equipped with a switching mechanism that can switch between states where water from the water storage tank is supplied to the spray chamber, water from the spray chamber is returned to the water storage tank, and the state where the fluid connection between the water storage tank and the spray chamber is cut off to form an independent spray circulation system.

7. The heat recovery system as described in claim 6, characterized in that, The spray chamber is equipped with a drain valve for discharging water from the tank outside the water cooling system.

8. The heat recovery system as described in any one of claims 1 to 4, characterized in that, The water cooling system is equipped with a heat exchanger valve that allows at least a portion of the water to circulate between the water storage tank and the heat exchanger when the liquid level and temperature in the water storage tank reach or exceed their respective specified values.

9. The cold and heat recovery system as described in claim 8, characterized in that, The heat recovery system is a heat recovery system used in the yeast cultivation process. The air-conditioned room includes a yeast cultivation room and / or a yeast storage room. The heat exchanger is used to exchange heat between the water from the water storage tank and the process water in the yeast cultivation room.

10. The heat recovery system as described in any one of claims 1 to 4, characterized in that, The heat recovery system also includes a cooling tower connected to the water-cooled unit.

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