Heat recovery system and dryer

Abstract

To recover heat of moisture of fluid.SOLUTION: A heat recovery system includes: latent heat exchange means 1 (latent heat exchanger) that adsorbs moisture of fluid and in which an adsorbent for recovering latent heat of the fluid is applied to an outer side of a heat transfer pipe; and heat pump means 3 including a refrigerant of which latent heat is recovered by flowing inside of the heat transfer pipe of the latent heat exchange means 1 (latent heat exchanger). In the heat pump means, the refrigerant is compressed so as to raise its temperature and a heated medium is heated by using the refrigerant with the raised temperature. The heated medium is heated by using heat of humidity of the fluid.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a heat recovery system that recovers heat contained in the humidity of a fluid (air), and a drying device that uses the heat recovered by the heat recovery system as a heat source for drying. [Background technology]

[0002] A heat pump is known as a technology for generating heated and cooled materials by compressing a refrigerant with a compressor to obtain a high-temperature, high-pressure refrigerant and expanding the refrigerant with an expansion valve to obtain a low-temperature, low-pressure refrigerant (see, for example, Patent Document 1). A heat pump can obtain several times the thermal energy compared to the input energy, making it possible to significantly reduce running costs as an energy-saving facility.

[0003] Air (a fluid) has energy in the form of temperature (sensible heat) and humidity (latent heat). For this reason, it is thought that there is a possibility that the latent heat of air can be efficiently recovered and effectively used as a heat source, and there is currently a demand for the development of technology that can effectively use the latent heat of air as a heat source. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2023-71185 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in consideration of the above circumstances, and has an object to provide a heat recovery system capable of recovering heat of humidity contained in a fluid.

[0006] The present invention has also been made in consideration of the above-mentioned circumstances, and aims to provide a drying device that recovers the heat of humidity contained in the exhaust air after drying and uses the recovered heat as a heat source for drying. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the heat recovery system of the present invention according to claim 1 is characterized in that it comprises a latent heat exchange means in which an adsorbent that adsorbs moisture in a fluid and recovers the latent heat contained in the fluid (humidity) is applied to the outside of a heat transfer tube, and a heat pump means having a refrigerant that flows inside the heat transfer tube of the latent heat exchange means and from which latent heat is recovered, in which the refrigerant is compressed and heated, and a medium to be heated is heated by the heated refrigerant.

[0008] In the present invention according to claim 1, the fluid is circulated through a latent heat exchange means (adsorption means for recovering latent heat: a latent heat exchanger that recovers latent heat) through which a refrigerant flows, the moisture in the fluid is adsorbed, and the latent heat of the fluid is recovered by the refrigerant, so that the latent heat of the fluid is used as a heat source for the heat pump means, and the medium to be heated is heated by the heated refrigerant. Therefore, the heat of the humidity in the fluid can be recovered to heat the medium to be heated.

[0009] The heat recovery system of the present invention according to claim 2 is characterized in that, in the heat recovery system described in claim 1, it is provided with a sensible heat heat exchange means to which the fluid is fed and which recovers the sensible heat of the fluid, the fluid from which the sensible heat has been recovered by the sensible heat heat exchange means is fed to the latent heat heat exchange means to adsorb moisture, the fluid after the moisture has been adsorbed is heated by the sensible heat heat exchange means, and the fluid after the heating becomes the heated medium that is heated by the heat pump means.

[0010] In the present invention according to claim 2, the sensible heat of a fluid (e.g., exhaust gas from a dryer) is recovered by a sensible heat exchange means, moisture from the fluid from which the sensible heat has been recovered is adsorbed by an adsorbent in a latent heat heat exchange means to recover latent heat, the fluid (medium to be heated) from which the moisture has been adsorbed is heated by the sensible heat exchange means, and the heated medium is heated by a heat pump means to become a medium to be heated (e.g., high-temperature air for heating sent to a dryer).

[0011] In addition, the heat recovery system of the present invention according to claim 3 is characterized in that, in the heat recovery system described in claim 1, the adsorbent applied to the latent heat heat exchange means has a moisture absorption / release function of adsorbing moisture from the fluid and releasing the adsorbed moisture when the temperature is above a predetermined temperature.

[0012] In the present invention according to claim 3, moisture in the fluid is adsorbed by the adsorbent, and when the adsorbent is at or above a predetermined temperature, the adsorbed moisture is discharged.

[0013] A heat recovery system according to a fourth aspect of the present invention is the heat recovery system according to the third aspect, wherein the latent heat exchange means is constituted by a pair of latent heat exchangers, and includes a fluid switching means for switching a flow path of the fluid and a refrigerant switching means for switching a flow path of the refrigerant, and the fluid switching means and the refrigerant switching means are configured such that when moisture is adsorbed in one of the latent heat exchangers to recover the latent heat of the fluid, moisture is discharged (water is discharged) in the other of the heat exchangers, and the discharge (water) of moisture in the other of the heat exchangers is controlled by the heat pump means. The heat pump means is switched so that the heat pumping is performed by heating the other latent heat exchanger to a predetermined temperature or higher with the refrigerant after heating the heated medium in the heat pump means, and when moisture is adsorbed in the other latent heat exchanger and the latent heat of the fluid is recovered, moisture is released (water is discharged) in one of the latent heat exchangers, and the release of moisture (water is discharged) in one of the latent heat exchangers is performed by heating one of the latent heat exchangers to a predetermined temperature or higher with the refrigerant after heating the heated medium in the heat pump means.

[0014] In the present invention according to claim 4, by operating the fluid switching means and the refrigerant switching means, when moisture is adsorbed in one latent heat exchanger and the latent heat of the fluid is recovered, the other latent heat exchanger is heated to a predetermined temperature or higher to release (discharge) moisture, while when moisture is adsorbed in the other latent heat exchanger and the latent heat of the fluid is recovered, the one latent heat exchanger is heated to a predetermined temperature or higher to release (discharge) moisture. The release (discharge) of moisture in the latent heat exchanger (heating of the latent heat exchanger to a predetermined temperature or higher) is performed by the heat of the refrigerant after the heat pump means heats the medium to be heated.

[0015] In order to achieve the above-mentioned object, the drying apparatus of the present invention according to claim 5 comprises a heat recovery system according to any one of claims 1 to 4, and a drying means to which heating air is sent to dry an object to be dried and the heating air after drying is discharged as exhaust air, wherein the fluid to which moisture is adsorbed by the latent heat exchange means is the exhaust air of the drying means, and the heated medium heated by the heat pump means is the heating air sent to the drying means.

[0016] In the present invention according to claim 5, the moisture contained in the exhaust gas from the drying means is adsorbed by the adsorbent of the latent heat exchange means, the latent heat of the exhaust gas is recovered by the refrigerant of the heat pump means, and the heating air (high-temperature air for heating: medium to be heated) heated by the refrigerant is sent to the drying means. Therefore, the drying device recovers the heat of the moisture (humidity) contained in the exhaust gas after drying, and uses the recovered heat as a heat source for drying, thereby forming a drying device using a heating fluid. Effect of the Invention

[0017] The heat recovery system of the present invention makes it possible to recover heat of humidity contained in a fluid.

[0018] Furthermore, the drying device of the present invention can recover the heat of humidity contained in the exhaust gas after drying, and use the recovered heat as a heat source for drying. [Brief description of the drawings]

[0019] [Figure 1]1 is a schematic diagram showing the concept of a heat recovery system according to the present invention. [Diagram 2] 1 is a schematic diagram of a heat recovery system according to an embodiment of the present invention; [Diagram 3] 1 is a schematic diagram of a heat recovery system according to an embodiment of the present invention; [Figure 4] 1 is a schematic system diagram of a drying device according to an embodiment of the present invention. [Diagram 5] 1 is a schematic system diagram of a drying device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The heat recovery system of the present invention will be described with reference to Fig. 1. Fig. 1 shows a schematic system diagram illustrating the concept of the heat recovery system of the present invention.

[0021] The heat recovery system of the present invention is equipped with latent heat heat exchange means 1 in which an adsorbent that adsorbs moisture from a fluid (high humidity air) and recovers the latent heat contained in the high humidity air (humidity) is applied to the outside of a heat transfer tube, and a heat pump means 3 having a refrigerant that flows inside the heat transfer tube of the latent heat heat exchange means 1 and from which latent heat is recovered, the refrigerant being compressed and heated by compression means 2, and having condensation means 4 that heats a medium to be heated with the heated refrigerant.

[0022] In the heat recovery system shown in Fig. 1, high humidity air is converted to low humidity air by latent heat exchange means 1. The medium to be heated is heated by condensation means 4 of heat pump means 3, and becomes a high-temperature medium.

[0023] That is, high humidity air is circulated through latent heat exchange means 1 (adsorption means for recovering latent heat) through which a refrigerant circulates, and the moisture in the high humidity air is adsorbed, and the latent heat of the high humidity air is recovered by the refrigerant, and the latent heat of the high humidity air is used as the heat source for the heat pump means 3. The heated medium is heated by the heated refrigerant (the refrigerant is condensed by the condensing means 4), and a high-temperature heated medium is obtained.

[0024] For this reason, in the heat recovery system, the heat of the high-humidity air (humidity) that the high-humidity air has (the latent heat of the high-humidity air) is recovered, and the medium to be heated can be heated.

[0025] The adsorbent applied to the outside of the heat transfer tube of the latent heat exchange means 1 is a material that adsorbs moisture from the fluid (high humidity air) and releases the adsorbed moisture when the temperature is equal to or higher than a predetermined temperature.

[0026] The configuration of the heat recovery system of the present invention will be specifically described with reference to Figs.

[0027] Figures 2 and 3 show an outline of the system state, specifically illustrating the configuration of a heat recovery system according to one embodiment of the present invention. Figure 2 shows a state in which one latent heat exchanger (upper side in the figure) is adsorbing moisture from high humidity air, and Figure 3 shows a state in which the other latent heat exchanger (lower side in the figure) is adsorbing moisture from high humidity air.

[0028] As shown in the figure, the latent heat heat exchange means 1 is composed of a pair of latent heat exchangers, a first latent heat heat exchanger 11 (one latent heat heat exchanger) and a second latent heat heat exchanger 12 (the other latent heat heat exchanger).

[0029] The inlet flow path of humid air (indicated by the white arrow in the figure) is connected to the inlet side of the first latent heat heat exchanger 11 (upper side in the figure) and the inlet side of the second latent heat heat exchanger 12 (lower side in the figure) via inlet fluid switching means 13 (fluid switching means: 3 ports) as a fluid switching means.

[0030] The inflow fluid switching means 13 has a first port 13a connected to the first latent heat exchanger 11 and a second port 13b connected to the second latent heat exchanger 12. By switching the inflow fluid switching means 13, the flow path on the inflow side of the high humidity air is switched to either the first port 13a or the second port 13b.

[0031] The outflow side (lower side in the figure) of the first latent heat heat exchanger 11 and the outflow side (upper side in the figure) of the second latent heat heat exchanger 12 are connected to the outflow side flow path of low-humidity air via outflow fluid switching means 14 (fluid switching means: 3 ports) as a fluid switching means.

[0032] The outflow fluid switching means 14 has a first port 14a connected to the first latent heat exchanger 11 and a second port 14b connected to the second latent heat exchanger 12. By switching the outflow fluid switching means 14, the flow path on the outflow side of the low-humidity air is switched to either the first port 14a or the second port 14b.

[0033] Specifically, when the inflow fluid switching means 13 is switched so that the inflow side flow path for high humidity air is connected to the first port 13a, the outflow fluid switching means 14 is switched so that the outflow side flow path for low humidity air is connected to the first port 14a. Conversely, when the inflow fluid switching means 13 is switched so that the inflow side flow path for high humidity air is connected to the second port 13b, the outflow fluid switching means 14 is switched so that the outflow side flow path for low humidity air is connected to the second port 14b.

[0034] On the other hand, the passage on the outlet side (outlet side of the compressed refrigerant: outlet side of the compression means 2) of the condensation means 4 of the heat pump means 3 is connected to the refrigerant passages of the first latent heat heat exchanger 11 and the second latent heat heat exchanger 12 via the refrigerant switching means 15 (4 ports) (the system indicated by the arrows in the figure).

[0035] The refrigerant passages of the first latent heat heat exchanger 11 and the second latent heat exchanger 12 on the side to which the refrigerant switching means 15 is not connected are connected by a connecting passage (the system indicated by the arrow in the figure), and an expansion valve 18 is provided in the connecting passage.

[0036] The refrigerant switching means 15 has a first port 15a connected to a passage on the outlet side of the condensing means 4 (outlet side of the compressed refrigerant: outlet side of the compression means 2), and a second port 15b connected to a passage on the inlet side of the compression means 2 (passage to which the refrigerant is sent after being expanded by the expansion valve 18).

[0037] Furthermore, the refrigerant switching means 15 is provided with a third port 15c connected to the refrigerant passage of the first latent heat exchanger 11 and a fourth port 15d connected to the refrigerant passage of the second latent heat exchanger 12.

[0038] When the inflow fluid switching means 13 and the outflow fluid switching means 14 are switched so that the inflow side flow path for high humidity air is connected to the first port 13a and the outflow side flow path for low humidity air is connected to the first port 14a, the refrigerant switching means 15 is switched so that the outlet side passage of the condensation means 4 is connected to the first port 15a and the fourth port 15d, and the inlet side passage of the compression means 2 is connected to the second port 15b and the third port 15c.

[0039] When the inflow fluid switching means 13 and the outflow fluid switching means 14 are switched so that the inflow side flow path for high humidity air is connected to the second port 13b and the outflow side flow path for low humidity air is connected to the second port 14b, the refrigerant switching means 15 is switched so that the outlet side passage of the condensation means 4 is connected to the first port 15a and the third port 15c, and the inlet side passage of the compression means 2 is connected to the second port 15b and the fourth port 15d.

[0040] In the heat recovery system shown in Figs. 2 and 3, high humidity air is converted to low humidity air by the latent heat exchange means 1, and the medium to be heated is heated by the condensation means 4 of the heat pump means 3 to become a high-temperature medium.

[0041] At this time, the switching of the inflow fluid switching means 13, the outflow fluid switching means 14, and the refrigerant switching means 15 is controlled in an integrated manner by a control means (not shown), and the first latent heat heat exchanger 11 and the second latent heat exchanger 12 alternately adsorb moisture from the high humidity air (recover latent heat from the high humidity air) and release the adsorbed moisture.

[0042] With reference to FIG. 2, a case will be described in which the first latent heat exchanger 11 adsorbs moisture from high humidity air and the second latent heat exchanger 12 releases the adsorbed moisture.

[0043] As shown in the figure, the inflow fluid switching means 13 is switched so that the inflow side flow path of high humidity air is connected to the first port 13a, and the outflow fluid switching means 14 is switched so that the outflow side flow path of low humidity air is connected to the first port 14a. The refrigerant switching means 15 is switched so that the outlet side passage of the condensing means 4 is connected to the first port 15a and the fourth port 15d, and the inlet side passage of the compressing means 2 is connected to the second port 15b and the third port 15c.

[0044] High-humidity air (indicated by a hollow arrow in the figure) is sent to the first latent heat exchanger 11 through the inflow fluid switching means 13, where moisture is adsorbed, and the latent heat of the high-humidity air is recovered in the first latent heat exchanger 11. The high-humidity air with moisture adsorbed in the first latent heat exchanger 11 becomes low-humidity air and is discharged through the outflow fluid switching means 14.

[0045] Meanwhile, the refrigerant compressed in the compression means 2 and heated to a high temperature (indicated by the arrow in the figure) is sent to the condensation means 4 to heat the medium to be heated. After heating the medium to be heated, the refrigerant is sent to the second latent heat exchanger 12 through the refrigerant switching means 15, and the second latent heat exchanger 12 is heated to a predetermined temperature or higher. By heating the second latent heat exchanger 12 to a predetermined temperature or higher, the moisture adsorbed in the second latent heat exchanger 12 is released.

[0046] The refrigerant that has been heated in the second latent heat exchanger 12 (the refrigerant after heating the heated medium) is expanded in the expansion valve 18, passes through the first latent heat exchanger 11 and the refrigerant switching means 15, and is sent to the compression means 2 where it is compressed.

[0047] 2, moisture from the high humidity air is adsorbed in the first latent heat exchanger 11, and the latent heat from the high humidity air can be recovered by the first latent heat exchanger 11. The latent heat recovered by the first latent heat exchanger 11 becomes the heat source for the heat pump means 3. The heated refrigerant then heats the medium to be heated (the refrigerant is condensed by the condensing means 4), and a high-temperature heated medium is obtained.

[0048] A case where moisture from high humidity air is adsorbed in second latent heat exchanger 12 and the adsorbed moisture is discharged in first latent heat exchanger 11 will be described with reference to FIG.

[0049] As shown in the figure, the inflow fluid switching means 13 is switched so that the inflow side flow path of high humidity air is connected to the second port 13b, and the outflow fluid switching means 14 is switched so that the outflow side flow path of low humidity air is connected to the second port 14b. The refrigerant switching means 15 is switched so that the outlet side passage of the condensation means 4 is connected to the first port 15a and the third port 15c, and the inlet side passage of the compression means 2 is connected to the second port 15b and the fourth port 15d.

[0050] High-humidity air (indicated by a hollow arrow in the figure) is sent through inflow fluid switching means 13 to second latent heat exchanger 12, where moisture is adsorbed, and the latent heat of the high-humidity air is recovered in second latent heat exchanger 12. The high-humidity air with moisture adsorbed in second latent heat exchanger 12 becomes low-humidity air and is discharged through outflow fluid switching means 14.

[0051] Meanwhile, the refrigerant compressed in the compression means 2 and heated to a high temperature (indicated by the arrow in the figure) is sent to the condensation means 4 to heat the medium to be heated. After heating the medium to be heated, the refrigerant is sent to the first latent heat exchanger 11 through the refrigerant switching means 15, and the first latent heat exchanger 11 is heated to a predetermined temperature or higher. By heating the first latent heat exchanger 11 to a predetermined temperature or higher, the moisture adsorbed in the first latent heat exchanger 11 is released.

[0052] The refrigerant that has been heated in the first latent heat exchanger 11 (the refrigerant after heating the heated medium) is expanded in the expansion valve 18, passes through the second latent heat exchanger 12 and the refrigerant switching means 15, and is sent to the compression means 2 where it is compressed.

[0053] 3, moisture in the high humidity air is adsorbed in the second latent heat exchanger 12, and the latent heat of the high humidity air can be recovered by the second latent heat exchanger 12. The latent heat recovered by the second latent heat exchanger 12 becomes the heat pump means 3. The heated medium is then heated by the heated refrigerant (the refrigerant is condensed by the condensing means 4), and a high-temperature heated medium is obtained.

[0054] As described above, in the heat recovery system, by operating the inflow fluid switching means 13, the outflow fluid switching means 14, and the refrigerant switching means 15, when moisture is adsorbed in the first latent heat heat exchanger 11 and the latent heat of the high humidity air is recovered, the second latent heat heat exchanger 12 is heated to a predetermined temperature or higher and the moisture is released (discharged), while when moisture is adsorbed in the second latent heat heat exchanger 12 and the latent heat of the high humidity air is recovered, the first latent heat heat exchanger 11 is heated to a predetermined temperature or higher and the moisture is released (discharged).

[0055] The release of moisture (water discharge) in the first latent heat heat exchanger 11 and the second latent heat heat exchanger 12 (heating of the first latent heat heat exchanger 11 and the second latent heat heat exchanger 12 to a predetermined temperature or higher) is performed by the heat of the refrigerant after the heated medium is heated by the heat pump means 3.

[0056] Therefore, in the above-described heat recovery system, the heat of moisture contained in the high-humidity air can be recovered by the first latent heat exchanger 11 and the second latent heat exchanger 12 (the latent heat of the high-humidity air is recovered) and used as a heat source for the heat pump means 3, and the medium to be heated can be heated by the heat pump means 3 (the condensing means 4). That is, the latent heat of the high-humidity air can be recovered to heat the medium to be heated.

[0057] The configuration of the drying device of the present invention will be specifically described with reference to Figs.

[0058] Figures 4 and 5 show a schematic system state that specifically represents the schematic configuration of a drying device to which the heat recovery system shown in Figures 2 and 3 is applied, with Figure 4 showing the state of the heat recovery system shown in Figure 2, and Figure 5 showing the state of the heat recovery system shown in Figure 3. For this reason, the same members as those shown in Figures 2 and 3 are given the same reference numerals, and detailed explanations are omitted.

[0059] As shown in Figures 4 and 5, the drying device of the present invention is equipped with drying means 21 to which high-temperature air for heating (heating air: heated medium of a heat recovery system) is sent to dry the material to be dried. The high-temperature air for heating sent to the drying means 21, i.e., the heated medium heated by the condensing means 4, is heated by a heater 22 (means equipped with a heat source such as a gas burner). The heater 22 may be omitted.

[0060] A sensible heat exchanger 23 (sensible heat exchange means) is provided to recover the sensible heat of the exhaust gas from the drying means 21. The exhaust gas from which the sensible heat has been recovered by the sensible heat exchanger 23 becomes high humidity air of the heat recovery system, and the latent heat is recovered by the first latent heat exchanger 11 or the second latent heat exchanger 12.

[0061] The fluid (low humidity air) after moisture has been adsorbed in the first latent heat exchanger 11 or the second latent heat exchanger 12 is heated in the sensible heat exchanger 23, and then heated in the condensing means 4 and heater 22 (heated in the heat pump means 3) to become high-temperature air for heating in the drying means 21.

[0062] A case where moisture from high humidity air is adsorbed in first latent heat exchanger 11 and the adsorbed moisture is discharged in second latent heat exchanger 12 will be described with reference to FIG.

[0063] The low-humidity air (temperature T1) heated up by the sensible heat exchanger 23 is heated up by the condensing means 4 (temperature T2: T2 > T1) and further heated up by the heater 22 to become high-temperature air for heating (temperature T3: T3 > T2). The exhaust gas (temperature T4: T4 < T3) after drying the object to be dried by the drying means 21 is cooled down by the sensible heat exchanger 23 to become high-humidity air (temperature T5: T5 < T4), and is sent to the first latent heat exchanger 11 where moisture is adsorbed. During this time, the second latent heat exchanger 12 is heated to a predetermined temperature or higher and moisture is released (drained).

[0064] The low-humidity air (temperature T6) after moisture is adsorbed by the first latent heat exchanger 11 is heated up by the sensible heat exchanger 23 to become low-humidity air at temperature T1 (T1 > T6). Then, the low-humidity air (temperature T1) is heated up by the condensing means 4 and the heater 22 to become high-temperature air for heating (temperature T3).

[0065] Based on FIG. 5, the case where moisture of the high-humidity air is adsorbed by the second latent heat exchanger 12 and the adsorbed moisture is drained by the first latent heat exchanger 11 will be described.

[0066] The low-humidity air (temperature T1) heated up by the sensible heat exchanger 23 is heated up by the condensing means 4 (temperature T2: T2 > T1) and further heated up by the heater 22 to become high-temperature air for heating (temperature T3: T3 > T2). The exhaust gas (temperature T4: T4 < T3) after drying the object to be dried by the drying means 21 is cooled down by the sensible heat exchanger 23 to become high-humidity air (temperature T5: T5 < T4), and is sent to the second latent heat exchanger 12 where moisture is adsorbed. During this time, the first latent heat exchanger 11 is heated to a predetermined temperature or higher and moisture is released (drained).

[0067] The low-humidity air (temperature T6) after moisture is adsorbed by the second latent heat exchanger 12 is heated up by the sensible heat exchanger 23 to become low-humidity air at temperature T1 (T1 > T6). Then, the low-humidity air (temperature T1) is heated up by the condensing means 4 and the heater 22 to become high-temperature air for heating (temperature T3).

[0068] In the above-mentioned drying device, the moisture contained in the exhaust air from the drying means 21 is adsorbed by the adsorbent of the first latent heat exchanger 11 or the second latent heat exchanger 12, the latent heat of the exhaust air (high humidity air) is recovered by the refrigerant of the heat pump means 3, and the high-temperature air (heated medium) heated by the refrigerant is sent to the drying means 21.

[0069] Therefore, the drying device recovers the latent heat of the exhaust air (high humidity air) and uses the recovered heat as a heat source for drying. Therefore, the above-mentioned drying device recovers the heat of humidity contained in the exhaust air after drying and can use the recovered heat as a heat source for drying. [Industrial Applicability]

[0070] INDUSTRIAL APPLICABILITY The present invention can be used in the industrial fields of heat recovery systems and drying devices. [Explanation of symbols]

[0071] 1 Latent heat exchange means 2. Compression Method 3. Heat pump means 4. Condensation Method 11 First latent heat exchanger 12 Second latent heat exchanger 13 Inflow fluid switching means 14 Outflow fluid switching means 15 Refrigerant switching means 18 Expansion valve 21 Drying means 22 Heater 23 Sensible heat exchanger

Claims

1. a latent heat exchange means in which an adsorbent that adsorbs moisture in a fluid and recovers latent heat of the fluid is applied to the outside of a heat transfer tube; a heat pump means for heating a medium to be heated by the refrigerant that flows through the heat transfer tube of the latent heat exchange means and from which latent heat is recovered, the refrigerant being compressed and heated; A heat recovery system comprising:

2. 2. The heat recovery system according to claim 1, a sensible heat exchange means for receiving the fluid and recovering sensible heat of the fluid; The fluid from which sensible heat has been recovered by the sensible heat exchange means is sent to the latent heat exchange means where moisture is adsorbed thereto, the fluid after the moisture has been adsorbed is heated by the sensible heat exchange means, and the fluid after the temperature has been increased becomes the heated medium to be heated by the heat pump means. A heat recovery system comprising:

3. 2. The heat recovery system according to claim 1, The adsorbent applied to the latent heat exchange means is The device has a moisture absorbing and releasing function that absorbs moisture from the fluid and releases the absorbed moisture when the temperature is above a predetermined level. A heat recovery system comprising:

4. 4. The heat recovery system according to claim 3, The latent heat exchange means is composed of a pair of latent heat exchangers, The fluid switching means switches the flow path of the fluid, and the refrigerant switching means switches the flow path of the refrigerant, The fluid switching means and the refrigerant switching means include: When moisture is adsorbed in one of the latent heat exchangers to recover the latent heat of the fluid, moisture is discharged (water is discharged) in the other of the latent heat exchangers, and the discharge of moisture (water is discharged) in the other of the latent heat exchangers is performed by heating the other of the latent heat exchangers to a predetermined temperature or higher with the refrigerant after the heat pump means has heated the medium to be heated, and When moisture is adsorbed in the other latent heat exchanger and the latent heat of the fluid is recovered, moisture is discharged (water is discharged) in one of the latent heat exchangers, and the discharge of moisture (water is discharged) in one of the latent heat exchangers is performed by heating one of the latent heat exchangers to a predetermined temperature or higher with the refrigerant after the heat pump means has heated the medium to be heated. A heat recovery system comprising:

5. A heat recovery system according to any one of claims 1 to 4; A drying means for blowing heating air to dry the object to be dried and discharging the heating air after drying as exhaust air, the fluid into which moisture is adsorbed by the latent heat exchange means is the exhaust gas from the drying means; The medium to be heated by the heat pump means is the heating air sent to the drying means. A drying device characterized by:

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