Cold and heat recovery system and control method thereof

Abstract

The invention relates to a cold and heat recovery system and a control method thereof. 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] The present application relates to a cold and heat recovery system and a control method thereof, and in particular to a cold and heat recovery system and a control method thereof for a koji cultivation process. Background Art

[0002] With the annual expansion of the scale of the food processing industry, the increase in the number of small and medium-sized food factories has caused an increase in energy consumption demand and sewage pressure. Therefore, it is very important to provide a suitable process processing environment to meet the temperature, humidity, air quality and other requirements of each production process. Taking the process flow of koji processing as an example, in the three major processes of koji making, koji cultivation and koji storage, a large amount of heat will be generated during the fermentation / cultivation of raw materials, and the temperature and humidity environment of the room plays a key role in the fermentation of raw materials. Among them, the koji making process is mainly the process of making raw materials into koji blocks; the koji cultivation process is mainly to ferment and cultivate the koji blocks under a specified environment, so as to generate Aspergillus and fungi required for brewing in the koji blocks; the koji storage process is mainly the process of preserving the cultivated koji blocks. In the previous koji processing technology, there is a problem that a large amount of electricity is consumed in order to meet the temperature and humidity requirements in the koji production process, and the large amount of heat generated in the process is not effectively utilized. Summary of the invention

[0003] This application is made in view of the technical problems existing in the above-mentioned prior art. One purpose of this application is to provide a cold and heat recovery system and a control method thereof, which can effectively utilize the heat generated in the production process of wine koji, thereby reducing the power consumption used in the production process.

[0004] According to one scheme of the present application, a cold and heat recovery system is provided. The cold and heat recovery system includes a water cooling system and an 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 condensed water condensed from air circulating in the air circulation system to the water storage tank. The water storage tank is configured to supply water stored in the water storage tank to the spray chamber and the heat exchanger respectively. The air circulation system includes: a fresh air pipeline for conveying fresh air to the spray chamber and the surface cooler; an air supply pipeline for conveying air that has been temperature and / or humidity adjusted in the spray chamber and the surface cooler to an air-conditioned room that needs air conditioning; and a return air pipeline for returning the return air that has been air-conditioned in the air-conditioned room to the spray chamber and the surface cooler.

[0005] According to the above-mentioned cold and heat recovery system of the present application, it can also be: the cold and heat recovery system has a cooling mode that puts the water cooling unit in a working state and a heating mode that puts the water cooling unit in a non-working state.

[0006] According to the above-mentioned cold and heat recovery system of the present application, it can also be: the refrigeration mode includes a single cooling mode in which the spray chamber and the surface cooler are both in working state, and a humidification mode in which the spray chamber is in working state and the surface cooler is in non-working state.

[0007] According to the above-mentioned cold and heat recovery system of the present application, it can also be: a sprinkler and a tank for receiving the spray water sprayed from the sprinkler are arranged in the spray chamber, and the water cooling system is constructed so that when the liquid level height 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 height 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.

[0008] According to the above-mentioned cold and heat recovery system of the present application, it can also be: a switching mechanism is provided in the water cooling system, which can switch between the state of supplying the water in the water tank to the spray room, the state of returning the water in the spray room to the water tank, and the state of cutting off the fluid connection between the water tank and the spray room to form an independent spray circulation system.

[0009] According to the above-mentioned cold and heat recovery system of the present application, it can also be that: the spray chamber is provided with a drain valve for discharging the water in the tank to outside the water cooling system.

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

[0011] According to the above-mentioned heat and cold recovery system of the present application, it can also be: the heat and cold recovery system is a heat and cold recovery system for the koji cultivation process, the air-conditioned room includes a koji cultivation room and / or a koji 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 koji making room.

[0012] According to the above-mentioned cold and heat recovery system of the present application, it can also be that: the cold and heat recovery system also includes a cooling tower connected to the water cooling unit.

[0013] According to another embodiment of the present application, a control method for a cold and heat recovery system is provided. The cold and heat recovery system includes a water cooling system and an air circulation system, wherein the water cooling system includes a water cooling unit, a water storage tank, a surface cooler, a spray chamber and a heat exchanger, and the air circulation system includes a fresh air pipeline, a supply air pipeline and a return air pipeline. The control method of the cold and heat recovery system includes: controlling the water cooling system so as to supply chilled water from the water cooling unit to the water storage tank and the surface cooler respectively, supplying condensed water condensed by the surface cooler from the air circulating in the air circulation system to the water storage tank, and supplying the water stored in the water storage tank to the spray room and the heat exchanger respectively; and controlling the air circulation system so as to transport fresh air as the air outside the system to the spray room and the surface cooler through the fresh air duct, transporting the air whose temperature and / or humidity has been adjusted in the spray room and the surface cooler to the air-conditioned room that needs to be air-conditioned through the air supply duct, and returning the return air as the air conditioned in the air-conditioned room to the spray room and the surface cooler through the return air duct.

[0014] The control method of the cold and heat recovery system according to the present application may also include: controlling the cold and heat recovery system to switch between a cooling mode that puts the water cooling unit in an operating state and a heating mode that puts the water cooling unit in a non-operating state.

[0015] According to the control method of the above-mentioned cold and heat recovery system of the present application, it may also include: in the refrigeration mode, controlling the cold and heat recovery system to switch between a single cooling mode in which both the spray chamber and the surface cooler are in working state and a humidification mode in which the spray chamber is in working state and the surface cooler is in non-working state.

[0016] According to the control method of the above-mentioned cold and heat recovery system of the present application, it can also be: a sprinkler and a tank for receiving the spray water sprayed from the sprinkler are arranged in the spray chamber, and the control method of the cold and heat recovery system includes: controlling the water cooling system so 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 a specified value, the fluid connection between the water storage tank and the spray chamber is cut off to form an independent spray circulation system.

[0017] According to the control method of the above-mentioned cold and heat recovery system of the present application, it can also be: a switching mechanism is set in the water cooling system, and the control method of the cold and heat recovery system includes: using the switching mechanism to switch the water cooling system between the state of supplying the water in the water storage tank to the spray chamber, the state of returning the water in the spray chamber to the water storage tank, and the state of cutting off the fluid connection between the water storage tank and the spray chamber to form an independent spray circulation system.

[0018] According to the control method of the above-mentioned cold and heat recovery system of the present application, it can also be: the spray chamber is provided with a drain valve, and the control method of the cold and heat recovery system includes: in the refrigeration mode, when the temperature of the water in the tank of the spray chamber reaches or exceeds the upper limit value, opening the drain valve to discharge the water in the tank to the outside of the water cooling system.

[0019] According to the control method of the above-mentioned cold and heat recovery system of the present application, it can also be: a valve for a heat exchanger is provided in the water cooling system, and the control method of the cold and heat recovery system includes: when the liquid level height and temperature in the water storage tank reach or exceed their respective specified values, at least a part of the water is circulated between the water storage tank and the heat exchanger.

[0020] According to the control method of the above-mentioned cold and heat recovery system of the present application, it can also be: the cold and heat recovery system is a cold and heat recovery system for the koji cultivation process, the air-conditioning room includes a koji cultivation room and / or a koji storage room, and the control method of the cold and heat recovery system includes: controlling the flow of water between the water storage tank and the heat exchanger, so as to utilize the heat exchanger to perform heat exchange between the water from the water storage tank and the process water in the koji making room.

[0021] According to the control method of the above-mentioned cold and heat recovery system of the present application, it can also be: the cold and heat recovery system also includes a cooling tower connected to the water cooling unit, and the control method of the cold and heat recovery system also includes circulating water between the water cooling unit and the cooling tower.

[0022] Effects of the Invention

[0023] According to the cold and heat recovery system and control method thereof of the present application, the condensed water generated by the surface cooler can be collected by a water storage tank and supplied to the spray chamber for spraying, thereby adjusting the temperature and humidity of the air to be supplied to the air-conditioning room (i.e., the mixed air formed by the fresh air and the return air from the air-conditioning room to the spray chamber and the surface cooler). As a result, the load of the water-cooling unit can be reduced, the electricity consumed by the system can be saved, and the effect of energy saving and efficiency improvement can be achieved.

[0024] In addition, by having a cooling mode that puts the water cooling unit in an operating state and a heating mode that puts the water cooling unit in a non-operating state, it is possible to meet both cooling needs in summer and heating needs in winter.

[0025] In addition, the refrigeration modes include cooling mode only and humidification mode, which can meet different requirements for humidity in the production process.

[0026] In addition, an independent spray circulation system that is independent of the supply from the water storage tank can be formed between the sprayer and the tank in the spray room, thereby further improving the energy efficiency of the system.

[0027] 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, so that the cold or heat contained in the mixed air flowing through the spray chamber can be flexibly recovered, and an independent spray circulation system can be easily formed, thereby improving the energy efficiency of the system.

[0028] In addition, by draining the water in the tank of the spray room using a drain valve, the cooling or heating in the system can be adjusted more flexibly.

[0029] In addition, by providing a valve for a heat exchanger, and when the liquid level and temperature in the water tank reach or exceed their respective specified values, at least a portion of the water is circulated between the water tank and the heat exchanger, the cold or heat recovered from the water in the water tank can be more fully utilized to exchange heat for equipment that requires temperature regulation.

[0030] In addition, by using the cold and heat recovery system of the present application, the cold and / or heat generated in the koji cultivation process can be fully recovered and utilized, and while saving electricity consumption, the temperature and / or humidity in different stages of the koji cultivation process (koji cultivation room, koji storage room, koji making room) can be effectively adjusted.

[0031] In addition, by circulating water between the water-cooling unit and the cooling tower, the heat in the system can be discharged to the outside of the system by using the cooling tower, which can further reduce the load of the water-cooling unit and save the power consumed by the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of a cold and heat recovery system according to an embodiment of the present application.

[0033] Figure 2 It is a schematic diagram of a cooling-only mode of a heat recovery system according to an embodiment of the present application.

[0034] Figure 3 It is a schematic diagram showing a humidification mode of a cold and heat recovery system according to an embodiment of the present application.

[0035] Figure 4 It is a schematic diagram showing a heating mode of a cold and heat recovery system according to an embodiment of the present application. Description of reference numerals:

[0036] 1 Water cooling unit

[0037] 2 Water tanks

[0038] 3 Surface cooler

[0039] 4 Spray Room

[0040] 4a Sprinkler

[0041] Slot 4b

[0042] 5 Heat exchanger

[0043] 6 Cooling Tower

[0044] 7 Fresh air duct

[0045] 8 Air supply duct

[0046] 9 Return air duct

[0047] 10 Four-way valve (switching mechanism)

[0048] 11, 12, 13, 14 Pumps

[0049] 15, 16 Temperature sensor

[0050] 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 valves

[0051] 28 Temperature and humidity sensor

[0052] 29 Drain valve

[0053] 30 Peiqu Room

[0054] 31 Song Room

[0055] 32 Koji Making Room

[0056] 100 Heat and cold recovery system

[0057] 110 Water Cooling System

[0058] 120 Air circulation system DETAILED DESCRIPTION

[0059] The present disclosure is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect so defined can be combined with any other aspect or aspects unless explicitly stated to be incombinable. In particular, any feature that is considered to be preferred or advantageous can be combined with one or more other features that are considered to be preferred or advantageous.

[0060] The terms "first", "second", etc. that appear in the present disclosure are only for the convenience of description to distinguish different components with the same name, and do not indicate a sequence or a primary and secondary relationship.

[0061] Furthermore, when a component is referred to as being “on” another component, the component may be directly on the other component, or may be indirectly on the other component with one or more intermediate components interposed therebetween. Additionally, when a component is referred to as being “connected to” another component, the component may be directly connected to the other component, or may be indirectly connected to the other component with one or more intermediate components interposed therebetween. Hereinafter, the same reference numerals denote the same components.

[0062] The descriptions of directions or positional relationships indicated by “upper”, “lower”, “top”, “bottom”, “front”, “back”, “inside” and “outside” in the present disclosure are only for the convenience of describing the present disclosure, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present application.

[0063] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0064] Figure 1 1 represents a cold and heat recovery system 100 according to an embodiment of the present application. Figure 1 As shown, the cold and heat recovery system 100 includes a water cooling system 110 and an air circulation system 120 .

[0065] The water cooling system 110 includes a water cooling unit 1, a water storage tank 2, a surface cooler 3, a spray chamber 4 and a heat exchanger 5. The water cooling unit 1 can be, for example, an integrated water cooling unit having a compressor, an evaporator, a condenser, a throttling device, etc., or a heat pump or any other known refrigeration and / or heating equipment can be used instead of the water cooling unit. The water storage tank 2 is a device for storing water. Between the water cooling unit 1 and the water storage tank 2, and between the water cooling unit 1 and the surface cooler 3, pipelines capable of connecting the fluids to each other are respectively provided, and valves 21, 23, and 24 for controlling the flow of water in the pipelines are provided on the pipelines. By controlling the opening and closing of the valves 21, 23, and 24, the water cooled by the water cooling unit 1 can be selectively supplied to the water storage tank 2 or to the surface cooler 3, or to the water storage tank 2 and the surface cooler 3 at the same time. In addition, a pipeline that can connect the fluids of the water storage tank 2 and the surface cooler 3 is provided between the water storage tank 2 and the surface cooler 3, and valves 18 and 19 for controlling the flow of water are provided in the pipeline. By controlling the opening and closing of the valves 18 and 19, the condensed water generated by the surface cooler 3 can be selectively collected in the water storage tank 2. Therefore, the water storage tank 2 can store water from the water cooling unit 1 and can also collect the condensed water generated by the surface cooler 3. Furthermore, a pipeline that can connect the fluids of the water storage tank 2 and the spray chamber 4 is provided between the water storage tank 2 and the spray chamber 4, and a valve 20, a pump 11 and a four-way valve 10 as a switching mechanism are provided in the pipeline, so that the supply of water from the water storage tank 2 to the spray chamber 4 can be controlled by opening and closing the valve 20, switching the pump 11 and switching the four-way valve 10. In addition, a pipeline for fluid communication between the water storage tank 2 and the heat exchanger 5 is provided, and a valve 20, a valve 17 and a pump 12 are provided in the pipeline, so that the supply of water from the water storage tank to the heat exchanger 5 can be controlled by controlling the opening and closing of the valve 20 and the valve 17 and the switching of the pump 12. In addition, a return water pipeline for returning water to the water cooling unit 1 is provided between the surface cooler 3 and the water cooling unit 1 and between the heat exchanger 5 and the water cooling unit 1, and a pump 13 and a valve 25 are provided in the return water pipeline. By controlling the opening and closing of the valve 25 and the switching of the pump 13, the return of water from the surface cooler 3 and the heat exchanger 5 to the water cooling unit 1 can be controlled respectively. A sprayer 4a for spraying water from the water storage tank 2 and a tank 4b for receiving water sprayed by the sprayer 4a are provided in the spray chamber 4.

[0066] In addition, the air circulation system 120 includes a fresh air duct 7, an air supply duct 8, and a return air duct 9. The fresh air duct 7 delivers fresh air as air outside the system to the spray room 4 and the surface cooler 3. The air supply duct 8 delivers the air that has been temperature and / or humidity regulated in the spray room 4 and the surface cooler 3 to the air-conditioned room that needs to be air-conditioned. When the cold and heat recovery system 100 of the present application is applied to the koji cultivation process, the air-conditioned room can be, for example, a koji cultivation room 30 and / or a koji storage room 31. The return air duct 9 is used to return the return air that has been air-conditioned in the air-conditioned room (for example, the koji cultivation room 30 and / or the koji storage room 31) to the spray room 4 and the surface cooler 3. Therefore, in fact, when the cold and heat recovery system 100 is working, the fresh air sent into the spray room 4 by the fresh air duct 7 and the return air sent into the spray room 4 by the return air duct 9 are mixed to form mixed air. In the spray room 4, the mixed air exchanges heat and moisture with the spray water sprayed by the sprayer 4a, and then the mixed air is cooled and dehumidified by the surface cooler 3. Then, the air whose temperature and / or humidity has been adjusted in the spray room 4 and the surface cooler is supplied to the air-conditioned room (for example, the song cultivation room 30, the song storage room 31) via the air supply pipe 8.

[0067] Below, we will refer to the attached Figure 2 , 3 4 and 5 illustrate the three working modes and related control methods of the cold and heat recovery system 100 of the present application. Figure 2 is a schematic diagram showing a cooling-only mode of a cooling and heat recovery system according to an embodiment of the present application; Figure 3 is a schematic diagram showing a humidification mode of a cold and heat recovery system according to an embodiment of the present application; Figure 4 It is a schematic diagram showing a heating mode of a cold and heat recovery system according to an embodiment of the present application.

[0068] In the koji cultivation process, the temperature and / or humidity of the koji cultivation room 30, the koji storage room 31, etc. are adjusted as needed. In addition, the temperature of the process water in the koji making room also needs to be adjusted.

[0069] In the case of high ambient temperature such as in summer, in order to cool down the song-raising room 30, the song-storing room 31, etc., the cold and heat recovery system 100 can be operated in the cooling mode. In addition, depending on the ambient humidity and / or process requirements, it is sometimes necessary to humidify the song-raising room 30 and the song-storing room 31. Therefore, the cooling mode of the cold and heat recovery system 100 according to the present application includes a cooling mode that does not require humidification of the song-raising room 30 and the song-storing room 31, and a humidification mode that humidifies the song-raising room 30 and the song-storing room 31. As an example, a temperature and humidity sensor 28 can be provided in the air supply duct 8, and the temperature and humidity of the air supplied to the song-raising room 30 and the song-storing room 31 detected by the temperature and humidity sensor 28 determine whether the cold and heat recovery system 100 adopts the cooling mode or the humidification mode.

[0070] In cooling mode, if Figure 2 As shown, by opening valves 21, 23, and 24, the water cooling unit 1 can be used as the first cold source, and two low-temperature water supply paths are formed from the water cooling unit 1. One water supply path is a path for supplying low-temperature water formed by the water cooling unit 1 to the surface cooler 3 via valve 23. The surface cooler 3 uses the low-temperature water supplied by the water cooling unit 1 to cool and dehumidify the mixed air formed by the fresh air supplied by the fresh air pipeline 7 and the return air supplied by the return air pipeline 9. The other water supply path is a path for supplying low-temperature water formed by the water cooling unit 1 to the water storage tank 2 via valve 21, which is used to ensure the liquid level height and cooling capacity requirement of the water storage tank (9). In addition, the condensed water generated when the surface cooler 3 processes the mixed air is collected in the water storage tank 2. The condensed water collected in the water storage tank 2 is condensed on the surface of the surface cooler 3 during the heat exchange between the mixed air with a relatively high temperature and the low-temperature water circulating 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 condensed water collected from the surface cooler 3 and having a temperature higher than that of low-temperature water, the temperature of the water stored in the water tank 2 is higher than the low-temperature water supplied by the water cooling unit 1, and is referred to herein as medium and low-temperature water.

[0071] Furthermore, by opening valves 17, 18, 19, and 20, and switching the connection direction of the four-way valve 10, the water tank 2 can be used as the second cold source to form two medium and low temperature water supply paths starting from the water tank 2. Among them, one medium and low temperature water supply path is a path for supplying medium and low temperature water to the spray chamber 4 by switching the four-way valve 10 to open the ac direction shown in the figure and close the bd direction. By supplying medium and low temperature water to the sprinkler 4a arranged in the spray chamber 4 and spraying the mixed air formed by the fresh air and the return air by the sprinkler 4a, the mixed air can be pre-cooled. Another medium and low temperature water supply path is a path for supplying medium and low temperature water to the heat exchanger 5 via valve 17, which is used to use the medium and low temperature water supplied to the heat exchanger 5 to adjust the temperature of the process water in the koji making room 32.

[0072] According to the detection result of the temperature and humidity sensor 28, it is determined that the cold and heat recovery system 100 is operating in the cooling-only mode.

[0073] In the cooling-only mode, valves 23, 18 and 19 are opened, and the water-cooling unit 1 supplies low-temperature water to the surface cooler 3. As described above, on the one hand, the mixed air is cooled by the surface cooler 3, and on the other hand, the condensed water 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 liquid level sensor (not shown) and a temperature sensor 15 are provided in the water storage tank 2. The opening of the valve 21 is determined according to the liquid level height and temperature detected by the liquid level sensor and the temperature sensor 15, so as to control the flow rate of the low-temperature water supplied to the water storage tank 2 by the water-cooling unit 1. Furthermore, the start timing of the pump 12 is determined according to the temperature of the water in the water storage tank 2 detected by the temperature sensor 15. Thus, the water storage tank 2 is used as a device with drainage, overflow and water replenishment functions to meet the requirements of water pressure, flow rate, etc. The flow rate and / or cooling capacity of water supplied from the water tank 2 to the spray chamber 4 and the heat exchanger 5 can be changed by adjusting the opening of the valve 17 disposed in the pipeline connecting the water tank 2 and the heat exchanger 5 .

[0074] When the four-way valve 10 is in a state where the ac direction is open and the bd direction is closed, at least a portion of the medium and low temperature water in the water storage tank 2 is supplied to the spray chamber 4. During a certain operation time of the cold and heat recovery system 100, if the condensed water from the surface cooler 3 can meet the flow / cooling capacity demand of the water storage tank 2, the spray water supplied from the water storage tank 2 to the spray chamber 4 mainly comes from the condensed water generated by the surface cooler 3, and the supply of low temperature water from the water cooling unit 1 is not required.

[0075] A liquid level sensor (not shown) may also be provided in the tank 4b of the spray room 4. When the liquid level in the tank 4b reaches a specified value, the four-way valve 10 may be switched to open the ab direction and close the cd direction, and at the same time, the pump 11 may be turned on, thereby forming an independent spray circulation system between the sprayer 4a and the tank 4b in the spray room 4 without the need for water from the water storage tank 2.

[0076] In the spray room 4, the mixed air formed by the fresh air and the return air directly contacts the spray water to exchange heat and moisture, which can reduce the temperature of the mixed air and play a role in precooling. The temperature of the spray water rises and is collected in the groove 4b. When the temperature sensor 16 set in the groove 4b detects that the temperature in the groove rises to above the upper limit value, the drain valve 29 set in the groove 4b can be opened to drain water to the outside of the cold and heat recovery system 100. When the water in the spray room is discharged to the outside of the cold and heat recovery system, in order to maintain the stability of the pressure / flow of the spray circulation system, the four-way valve 10 can be switched to the state of opening in the ac direction and closing in the bd direction again, and the water storage tank 2 can be used to replenish water to the spray room 4.

[0077] In the process of processing koji, not only cooling is required to control the temperature change rate of the koji block, but also appropriate humidity is required to ensure the growth rate of microorganisms. In the past, a humidifier was required for humidification. The cold and heat recovery system 100 of the present application is provided with a temperature and humidity sensor 28 in the air supply pipeline 8. When the temperature and humidity sensor 28 detects that the humidity of the air supplied to the koji cultivation room 30 and the koji storage room 31 is insufficient, the operation mode of the system is switched to the humidification mode.

[0078] like Figure 3 As shown, in the humidification mode, valves 23, 18, and 19 are closed, and valves 21 and 20 are opened, so that the water-cooling unit 1 only provides low-temperature water to the water storage tank 2, and the surface cooler 3 is in a non-operating state. As a result, the dehumidification effect of the surface cooler 3 is reduced, so that for the air supply to the song cultivation room 30 and the song storage room 31, it is actually equivalent to a humidification effect. In this case, the water storage tank 2 supplies water to the spray room 4 and the heat exchanger 5 respectively by means of the pump 12, and the flow rate / cooling capacity of the water supplied to the spray room 4 and the heat exchanger 5 can be changed by controlling the opening of the valve 17.

[0079] As in the cooling-only mode, when the four-way valve 10 is in the state of opening the ac direction and closing the bd direction, at least a part of the medium and low temperature water in the water storage tank 2 is supplied to the spray chamber 4. When the liquid level sensor in the tank 4b of the spray chamber 4 detects that the liquid level in the tank 4b reaches a specified value, the four-way valve 10 can be switched to open the ab direction and close the cd direction, and at the same time, the pump 11 is turned on, so that an independent spray circulation system is formed between the sprinkler 4a and the tank 4b in the spray chamber 4. In addition, when the temperature sensor 16 in the tank 4b detects that the temperature in the tank rises to above the upper limit value, the drain valve 29 in the tank 4b can be opened to drain water out of the cold and heat recovery system 100. When the water in the spray chamber is discharged out of the cold and heat recovery system, in order to maintain the stability of the pressure / flow of the spray circulation system, the four-way valve 10 can be switched to open the ac direction and close the bd direction again, and the water storage tank 2 can be used to replenish water to the spray chamber 4.

[0080] In the humidification mode, since relatively high temperature condensed water is not supplied from the surface cooler 3 to the water storage tank, the water storage tank 2 can directly provide low temperature water from the water cooling unit 1, so that the cooling load demand and humidity requirement of the mixed air can be met at the same time only through the heat and moisture exchange between the spray water of the sprayer 4a and the mixed air. In addition, when the temperature and humidity sensor 28 detects that the temperature and / or humidity of the supply air in the air supply pipeline 8 cannot meet the process requirements in the song cultivation room 30 and the song storage room 31, the amount of spray water can be increased by adjusting the frequency of the pumps 11 and 12, thereby increasing the coldness and humidity supply to the mixed air, so that the coldness and humidity of the supply air to the song cultivation room 30 and the song storage room 31 meet the process requirements.

[0081] In cooling mode (cooling mode or humidification mode) in summer, by opening valves 17, 22, and 25 and starting pump 10, return water from the surface cooler 3 and return water from the heat exchanger 5 can flow back to the water cooling unit 1 through valves 22 and 17.

[0082] In addition, in the cold and heat recovery system of the present application, a cooling tower 6 connected to the water cooling unit 1 can also be provided. 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 cooling unit 1, so that the cooling tower 6 can be used to discharge heat in cold and heat recovery system 100 to the outdoor environment.

[0083] Furthermore, in low temperature conditions such as winter, in order to make the process water in the koji making room 32 meet the requirements of the koji production process, the water cooling unit 1 is placed in a non-working state, thereby switching the cold and heat recovery system 100 to a heating mode.

[0084] In the heating mode, the demand for fresh air volume is reduced, and the high-temperature return air from the koji-making room 30 and the koji-storing room 31 is subjected to heat and moisture exchange in the spray room 4, so that the water in the tank 4b of the spray room 4 is heated and becomes medium-high temperature water. By returning the medium-high temperature water to the water storage tank 2, the water storage tank 2 can provide medium-high temperature water to the spray room 4 and the heat exchanger 5 to meet the temperature requirement for process water in the koji-making room 32.

[0085] Specifically, if Figure 4As shown, in the heating mode, valves 17, 18, 22, and 23 are closed, while valves 19, 20, 21, 24, and 25 are opened, and pump 13 is started. In addition, water cooling unit 1 is not in operation. In this case, by opening the four-way valve 10 in the ac direction and closing the bd direction, water is supplied from the water storage tank 2 to the sprinkler 4a of the spray room 4 by pump 12. After the cold and heat recovery system 100 has been running for a certain period of time, when the liquid level in the tank 4b reaches a specified value, the four-way valve 10 is opened in the ab direction and closed in the cd direction, and pump 11 is started, so that an independent spray circulation system is formed between the sprinkler 4a and the tank 4b in the spray room 4. The return air from the song cultivation room 30 and the song storage room 31 directly contacts the spray water to exchange heat and moisture. Thus, on the one hand, the temperature and humidity of the air sent to the koji-making room 30 and the koji-storing room 31 are adjusted through the heat and moisture exchange between the return air and the spray water, and on the other hand, the temperature of the spray water sprayed by the sprayer 4a is increased to form medium-high temperature water and collect 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 through 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, so as to adjust the temperature of the process water in the koji-making room 32.

[0086] Furthermore, in the heating mode, the temperature of the water sent out 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 sent out from the water storage tank 2 does not meet the temperature requirement, the opening of the valve 20 can be adjusted, and the frequency of the pump 11 can be regulated to control the circulating water flow rate, thereby increasing the temperature of the water returning from the tank 4b to the water storage tank 2.

[0087] When the temperature sensor 15 detects that the temperature of the water sent from the water storage tank 2 reaches the temperature requirement, the valve 17 is opened and the valve 19 is closed, that is, the valves 19, 22, and 23 are closed, and the valves 17, 20, 21, 24, and 25 are opened, and the pumps 12 and 13 are started to keep the water cooling unit 1 in a non-operating state. In this state, by making the four-way valve 10 open in the bd direction and closed in the ac direction, the medium and high temperature water in the water storage tank 2 is supplied to the heat exchanger (28) through the valves 17 and 20 by the pump 12, so as to exchange heat with the process water in the koji making room 32, adjust the temperature of the process water, and realize the heat supply to the koji making room 32. That is, the heat carried in the return air from the koji cultivation room 30 and the koji storage room 31 is used to convert the water in the spray room 4 into medium-high temperature water, and the medium-high temperature water is recovered to the water storage tank 2, and the recovered medium-high temperature water is supplied from the water storage tank 2 to the heat exchanger 5, and the process water in the koji making room 32 is heated by the heat exchanger 5, thereby realizing a heating mode that meets the process hot water demand of the koji making room. Then, the medium-low temperature water is returned to the water cooling unit 1 by the pump 13, and then, it is transported from the water cooling unit 1 to the water storage tank 2 again via valves 24 and 21, thereby forming a water supply and return loop.

[0088] The above is a description of the cold and heat recovery system 100 and its control method as an embodiment of the present application. With the cold and heat recovery system 100 and its control method as described above, the condensed water generated in the surface cooler 3 can be collected by the water storage tank 2 and supplied to the spray chamber 4 for spraying, so as to adjust the temperature and humidity of the air sent to the song cultivation room 30 and the song storage room 31, thereby reducing the load of the water cooling unit 1, saving the power required for the system, and achieving the effect of energy saving and efficiency improvement. In addition, by having a cooling mode that puts the water cooling unit 1 in a working state and a heating mode that puts the water cooling unit 1 in a non-working state, it can meet the cooling demand in summer and the heating demand in winter; further, by including a single cooling mode and a humidification mode in the cooling mode, it can cope with different requirements for humidity in the production process. In addition, since an independent spray circulation system that does not rely on the supply 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. In addition, 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, so that the cold or heat contained in the mixed air flowing through the spray chamber 4 can be flexibly recovered, and an independent spray circulation system can be easily formed, thereby improving the energy efficiency of the system. In addition, by using the drain valve 29 to discharge the water in the tank 4a of the spray chamber 4, the cold or heat in the system can be adjusted. In addition, 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 part of the water is circulated between the water storage tank 2 and the heat exchanger 5, and the cold or heat recovered from the water in the water storage tank 2 can be used to adjust the temperature of the process water in the koji making room 32. Thus, by using the cold and heat recovery system 100 of the present application, the cold and / or heat generated in the koji cultivation process can be fully recovered and utilized, and the temperature and / or humidity in the koji cultivation room 30, the koji storage room 31, the koji making room 32, etc. can be effectively adjusted while saving electricity consumption. In addition, by circulating water between the water cooling unit 1 and the cooling tower 6, the heat in the system is discharged outside the system by using the cooling tower 6, which can further reduce the load of the water cooling unit 1 and save the electricity consumed by the system.

[0089] Above, an implementation method of the cold and heat recovery system and its control method of the present application is described, but the present application is not limited to this. For example, as mentioned above, it is also possible to consider using a heat pump type host as a water cooling unit to meet the needs of summer cooling and winter heating. In the case of using a heat pump type host, when the outlet water temperature of the water storage tank cannot be met, the heat pump type host can quickly provide medium and high temperature hot water for process water in the koji making room. In addition, in the winter heating mode, since there is a certain conversion efficiency in relying on the circulation system of the spray room to recover the latent heat in the air, and the return air temperature (latent heat) is also the upper limit condition of the heat storage, therefore, when the heat pump type host is used as a heat source, when the heat demand cannot be met, the heat pump type host can be turned on to provide medium and high temperature hot water to the water storage tank that meets the requirements, which is also consistent with the heating process of the water storage tank.

[0090] In addition, it is also possible to consider adding electric heating equipment to the water tank to meet the problem of hot water supply in winter and ensure the outlet water temperature of the water tank. In the case of an electric heating device, the start and stop or output power of the electric heating device can be controlled by monitoring the outlet water temperature of the water tank.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall 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 condensed water condensed from air circulating in the air circulation system to the water storage tank. The water storage tank is configured to supply water stored in the water storage tank to the spray chamber and the heat exchanger respectively. The air circulation system includes: a fresh air duct that transports fresh air to the spray room and the surface cooler; an air supply duct that transports the air whose temperature and / or humidity has been adjusted in the spray room and the surface cooler to an air-conditioned room that needs air conditioning; and a return air duct that returns the return air that has been air-conditioned in the air-conditioned room to the spray room and the surface cooler.

2. The cold and heat recovery system according to claim 1, characterized in that: The cold and heat recovery system has a cooling mode that puts the water cooling unit in an operating state and a heating mode that puts the water cooling unit in a non-operating state.

3. The cold and heat recovery system according to claim 2, characterized in that: The cooling mode includes a cooling-only mode in which both the spray chamber and the surface cooler are in working state, and a humidification mode in which the spray chamber is in working state and the surface cooler is in non-working state.

4. The cold and heat recovery system according to claim 3, characterized in that: A sprinkler and a tank for receiving the spray water sprayed from the sprinkler are arranged in the spray chamber, and the water cooling system is configured to supply water from the water storage tank to the spray chamber as spray water when the liquid level in the tank is lower than a specified value, and to cut off the fluid connection between the water storage tank and the spray chamber to form an independent spray circulation system when the liquid level in the tank reaches or exceeds a specified value.

5. The cold and heat recovery system according to any one of claims 1 to 4, characterized in that: The water cooling system is provided with a switching mechanism capable of switching between a state in which the water in the water storage tank is supplied to the spray chamber, a state in which the water in the spray chamber is returned to the water storage tank, and a state in which the fluid connection between the water storage tank and the spray chamber is cut off to form an independent spray circulation system.

6. The cold and heat recovery system according to claim 5, characterized in that: The spray chamber is provided with a drain valve for draining the water in the tank out of the water cooling system.

7. The cold and heat recovery system according to any one of claims 1 to 4, characterized in that: The water cooling system is provided with a heat exchanger valve for causing 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 respective specified values.

8. The cold and heat recovery system according to claim 7, characterized in that: The heat and cold recovery system is a heat and cold recovery system for the koji cultivation process. The air-conditioned room includes a koji cultivation room and / or a koji storage room. The heat exchanger is used to exchange heat between the water from the water storage tank and the process water in the koji making room.

9. The cold and heat recovery system according to any one of claims 1 to 8, characterized in that: The cold and heat recovery system also includes a cooling tower connected to the water cooling unit.

10. A control method for a cold and heat recovery system, characterized in that: The heat recovery system includes a water cooling system and an 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 air circulation system includes a fresh air pipeline, an air supply pipeline and a return air pipeline. The control method of the cold and heat recovery system comprises: Controlling the water cooling system so that chilled water is supplied from the water cooling unit to the water storage tank and the surface cooler, respectively, condensed water condensed from air circulating in the air circulation system by the surface cooler is supplied to the water storage tank, and water stored in the water storage tank is supplied to the spray chamber and the heat exchanger, respectively; and The air circulation system is controlled so that fresh air as air outside the system is delivered to the spray room and the surface cooler through the fresh air duct, the air whose temperature and / or humidity has been adjusted in the spray room and the surface cooler is delivered to the air-conditioned room requiring air conditioning through the air supply duct, and the return air as air conditioned in the air-conditioned room is returned to the spray room and the surface cooler through the return air duct.

11. The control method of the cold and heat recovery system according to claim 10, characterized in that: include: The cold and heat recovery system is controlled to switch between a cooling mode in which the water cooling unit is in an operating state and a heating mode in which the water cooling unit is in a non-operating state.

12. The control method of the cold and heat recovery system according to claim 11, characterized in that: include: In the cooling mode, the cold and heat recovery system is controlled to switch between a cooling-only mode in which both the spray chamber and the surface cooler are in working state and a humidification mode in which the spray chamber is in working state and the surface cooler is in non-working state.

13. The control method of the cold and heat recovery system according to claim 12, characterized in that: The spray chamber is provided with a sprayer and a tank for receiving the spray water sprayed from the sprayer. The control method of the cold and heat recovery system includes: controlling the water cooling system so 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 room as spray water, and when the liquid level in the tank reaches or exceeds a specified value, the fluid connection between the water storage tank and the spray room is cut off to form an independent spray circulation system.

14. The control method of a cold and heat recovery system according to any one of claims 10 to 13, characterized in that: A switching mechanism is provided in the water cooling system. The control method of the cold and heat recovery system includes: using the switching mechanism to switch the water cooling system between a state in which the water in the water tank is supplied to the spray chamber, a state in which the water in the spray chamber is returned to the water tank, and a state in which the fluid connection between the water tank and the spray chamber is cut off to form an independent spray circulation system.

15. The control method of the cold and heat recovery system according to claim 14, characterized in that: The spray chamber is provided with a drain valve. The control method of the cold and heat recovery system includes: in the cooling mode, when the temperature of the water in the tank of the spray room reaches or exceeds an upper limit value, opening the drain valve to discharge the water in the tank outside the water cooling system.

16. The control method of a cold and heat recovery system according to any one of claims 10 to 13, characterized in that: A heat exchanger valve is provided in the water cooling system. The control method of the cold and heat recovery system comprises: when the liquid level and temperature in the water storage tank reach or exceed respective specified values, at least a portion of the water is circulated between the water storage tank and the heat exchanger.

17. The control method of the cold and heat recovery system as claimed in claim 16, characterized in that: The cold and heat recovery system is a cold and heat recovery system for the koji cultivation process, and the air-conditioning room includes a koji cultivation room and / or a koji storage room. The control method of the cold and heat recovery system includes: controlling the flow of water between the water storage tank and the heat exchanger so as to utilize the heat exchanger to perform heat exchange between the water from the water storage tank and the process water in the koji making room.

18. The control method of a cold and heat recovery system according to any one of claims 10 to 13, characterized in that: The cold and heat recovery system also includes a cooling tower connected to the water cooling unit. The control method of the cold and heat recovery system also includes circulating water between the water cooling unit and the cooling tower.

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